Except that it does have excellent anti-infantry. It reliably hits enemy squads for ~40% health every 1-2 shots, more when they are clumped, which is significantly better than the Panzer IV because it forces off squads faster and generally has a better chance to wipe squads. Spearhead gives even better AI because the hull gun will suppress. Add to that the highest AT DPM in the game (on paper even more than a vet 3 SU-85), a huge chunk of hitpoints and good frontal armor and great synergy with the Panzer Commander and HEAT Shells abilities.
The only real downsides of the Tiger II are that it's slow and that it's expensive and that its veterancy is still a bit of a mess, which means it's only good for dominating one part of the map and that it's hard to properly support it. But it is excellent at holding one portion of the map which makes it a good unit in teamgames. Combined with an Elefant or with a Jagdpanzer IV or two in support it becomes really tough to beat.
Let's be real sander. The KT has RNG based AI and great AT. The issue is it cannot use that AT unless your opponents push into the KT, which means they're bad or they're going to try and go for an all in flank/il2bomb/rocketrun etc. If it had excellent AI and as good of AT as everyone says it would be picked every match in 1v1 where TDs are significantly more rare. The AT is nothing short of best ingame when it's in range. It hardly ever misses tanks and is cappable of 3 shotting stock mediums. The issue is it's too slow to chase anything and the range is low enough that even mediocre players can kite very easily.
So with RNG based AI and low range AT and no mobility why would anyone pay 720MP 270F for this? When you can get the best TD ingame for 145F, 1400HP meat walls at 165F, and there's hilariously easy combos which can take out heavy tanks in seconds at the cost of a ram and 100 muni rocket run.
Is the KT "bad"? I don't think so, but it's on the lower end of the totem pole because of the enviorment of coh2 meta. A meta where 1 allied faction holds all the best off maps ingame, the next has the best TD in the game, and the last has the largest HP tank ingame. Why would you pick a KT into any of those things when OKWs anti infantry lategame power is in their obers and obers alone. OKW doesn't need another gimmick AT only unit. They already have 3 in the rak, JP4, and the panther.
Also 26 popcap is brutal.