You firmly believe IS-2 is strong while KT is weak.
That alone screams how bad and detached you are from reality.
IS-2 is in worse state then KT for almost a year, whatever you can do to KT, you can do the same to IS-2.
You're also grasping at straws HARD here, because IS-2 is the ONLY ALLIED VEHICLE IN GAME that is actually armored - and its not even meta for around a year.
You're not going to prove your point by using extremes either.
Again, allied and axis TDs do NOT have the same role nor they are supposed to engage the same targets.
You want to go against IS-2, use panther, if you're not using panther against IS-2, you're terrible and don't understand your very own faction you're fanboying so hard.
Again, read it slowly and multiple times, take as long as it takes to let it sink:
JP4 and StuG are there to counter MEDIUM armor and they do that very well.
Panther is there to counter HEAVY armor and it does it very well.
Allied TDs are supposed to fight BOTH medium AND heavy armor, because allies do NOT have stock super tanks in their end tiers, but they will eventually face them regardless of opponents doctrines.
The problem is the following:
allie infantery is mostly superior. Look at guards or other rifle and IS blobbs. Can walk around and right equiped deal with all targets.
Allie TDs are superior since last patches. German armor was nerfed hard. KT is slow a shit. is expanive as shit. (thats why noone build it last tournements. ot lose it/ repaired it all the game).
penals and guards can walk up against tanks without fear wiping, gurads slows the armor from far range, penals satchels it.
ever played against the new superior ISU? it wipies from 60-70 range units easily.
has the armor to bounce very often AT and TDs shot and can be really fast.(compared to jgtiger)
comes in a doc, where you can callin bombin run on heavy tank and destroy them. with guards, aim target and hiding AT gun.
So safe your ISU with AT and TDs and win easily ...jgtiger is no problem (see guards/penals/ bombing run)