I said I don't have a problem with the unit itself. I have a problem with the fact that all OKW have access to it, and so you will always see multiple KTs come out in team games, which skews their late-game advantage even further to their favor
I don't have a problem with the Ace, Elefant or Jagdtiger, because they are doctrinal, and you are giving something up to get them.
Multiple KTs? Yeah, because they are so cheap. If they are going for "fast" KT, simply counter their inf in early game and keep this into lategame. Cool. They have a nice tank but no vet inf anymore -> under constant harrasment VP victory for Allies. And if you see KT you don't have to fear that they will get another tank soon.
If this is too difficult for you, get Jackson, Bazookas + 1 other Tank. The KT has the slowest turret rotation speed and the lowest mobillity. I've seen even Hans getting owned by this combo. Just drive around with one tank and your inf(which has hopefully some vet) while the Jackson shoots from far. The KT has not that much armour as you think.
OR if this is still too skilled for you: just build OP ISU. Counters everything. Can't get destroyed by anything. So there plenty of ways to destroy your "Noobmobile". Yes, even in late game!