True and the germans adopted a mobile and elastic defence after kursk and north africa .
Hitler made so many horrible decisions during the war that needlessly got germans killed and just bad ideas on constructing a war economy built for a war of attrition on the home front as well.
On the one hand I will grant that the people who survived the war can always attribute their shortcomings to Hitler since he's no longer around to defend himself, but let's be real here. Hitler was a politician, not a military mind. He was a freakin Corporal at his highest rank in WWI. You can't tell me a corporal knows more about how to run a 5 million man strong Axis army than some of the greatest military minds ever like Rommel, Model, Heinz Guderian or Gotthard Heinrici.
Hitler made so many piss poor decisions along the way, for example ordering his men to never retreat under any circumstances needlessly got hundreds of thousands of german soldiers killed, maybe even millions. Someone correct me if I'm wrong but I thought the 6th army got annihilated at Stalingrad specifically BECAUSE Hitler refused to retreat when the battle was not going their way Getting bogged down in urban battles that bled manpower and annihilated entire armies from his most experienced troops vastly hurt the german war effort. Luftwaffe's pilots were quite shitty at the end of the war, he should have done what the Americans did, once someone became a fighter ace, rotate them away from the front lines to train the new pilots so they don't get shot down so easily.
Heinz Guderian did not support the Kursk offensive at all, when he wrote the book "Achtung!-Panzer!" He said the Kursk Offensive was missing two key prerequisites for a successful tank offensive which #1 open ground that's friendly to tanks (anti-tank ditches and thousands of minds spread across a vast front is NOT territory that's friendly to tanks) and #2 which is even more important, the element of surprise. Kursk had zero element of surprise associated with it since the Russians had built up the largest defensive works for a battle, 3 layers thick that ground down the german panzer offensive and opened the opportunity for a massive counter attack for the soviets.
If Germany was going to starve Great Britain into submission, they needed at least 370 U-Boats at the outset of the war, not 37.
Hitler had really bad ideas when it came to tank design. He was under this really bad assumption that "bigger = better". The KT for example got half a mile offroad PER 1 GALLON OF FUEL. For a fuel starved nation in the late war, this is NOT the tank you want to be fielding, not to mention only the largest of bridges could actually cross a KT, which were few and far between by 1944/45.
He had crazy ideas, some of us know about the Maus which was a 180 ton steel behemoth that would have largely been useless. THey only made like 1 prototype and it sit's in a Russian tank museum today. BUt did anyone know about the Ratt!? This thing was going to be like 1000 or 2000 tons land ship, something crazy, it was going to have naval guns, anti-air defenses, machine guns everywhere it was going to be a mega-tank with like a 40 man crew. Yea that would easily get annihilated in some kind of airstrike or artillery bombardment. Luckily someone finally put Hitler in his place and convinced him the Ratt would have been a horrible choice of tank design to invest Germany's research and development into.
This was also one of the problems with the massive railway artillery Germany used which they only had like 2 guns total, it was so big it was also incredibly vulnerable to where it basically couldn't be used much without having to retreat it for risk of losing it. The logistics of running the Railway artillery, you had to have workers lay down tracks AHEAD of the railway gun just to get it in place where it needed to go, whether that was Leningrad or Crimea or wherever they sent them to.
The Japanese also ran into this problem with their mega-battleship Yamato, it was so big and such a heavy investment of country resources that it was essentially too risky to use it in any actual battles, which is why it only finally got pulled out for the Battle of Okinawa (where it was promptly sunk with few losses for the Allies) when the war was desperate and futile at that point.
If Germany did their war effort correctly, instead of making 100's of designs on the drawing board for tanks, planes, guns, ships and such, they would have heavily invested into a handful of efficient designs and endlessly churned out that ONE good design. They only had like 1,300 tigers throughout the entire war, if they had simplified the design and made it more efficient they needed at least 13,000 of that design to make any kind of impact on the war effort.
I think those first 2 years of the Eastern front more German soldiers died of exposure than they did combat, winter clothing would have gone a long way in keeping them alive. For the battle of Moscow, which to me was the turning point in the war, not Stalingrad.
One more paragraph and I'm done because I could easily turn this post into a hundred pages if given time as an amateur historian with my knowledge base of WWII.
Simple things could have done wonders for the german war effort, winter clothing which was already mentioned. But just the basic infantry rifle. Besides the US every major country was still sporting bolt-action rifles for their front line infantry rifle. Basically a bunch of guys running around with sniper rifles without the scope. If Germany had mass produced the STG44 BEFORE starting the war, they very well may have had a significant head start on the types of infantry engagements WWII had, because the bolt action rifles iron sights and range was good up to like 5 kilometers but the days of a massive wall of infantry marching towards you from off in the distance was over, most infantry battles were occurring at ranges of 200 meters or less I believe.
One last thing, BF-109 flying across the English Channel with only 15 minutes of fuel once they got their, BF-109's were defensive planes, not offensive planes. Should have gone with the FW-190 if he wanted to wage an offensive air war against Britain early on where the planes actually had some fuel left over once they crossed the English channel.