I don’t know why you take it so personal, this is just how it is.
It’s not even a different playstyle, compared to WT or WoT, it’s just a worse version but very slightly faster.
Sure, you can pick whatever you want, but again, this approach is by far in the minority.
Going into a Puma when you can get a Tiger out, makes it not just harder on your team but on yourself and the majority of people find this frustrating.
The people that have no choice but to pick the Puma, because of their low level included.
Generally speaking, nobody has fun not being able to Pen anything and get absolutely dunked on by max tier vehicles and denying that is just cope.
There is a reason Battlerating in WarThunder exist for example.
Again: Yes you can try to drive 2.7 or so in 6.0 in WarThunder, but the people that actively do it because they have fun with it, are by far the exception, and again make it harder on their team as a result.
You can say “I don’t care about that” if you want, but this is just the reality of the situation.
Yes, the majority of people get frustrated when they can’t do anything with their tank such as the Stuart in Normandie, and then to the latest tank that can pen and/or bounce the most shots.
The difference between Tanks and overall Guns is, that Guns in general have Pros and Cons you switch between, while Tanks are just classified “worse version of V that can’t fight X,Y,Z” because of it.
Bolt actions technically have the lowest TTK with Semis having slightly less accuracy on the move and less range, while Autos can be very forgiving when you miss your opening shot.
There is no “best Gun” (at least generally speaking), that you literally can’t do anything against.
Even in the worst case: half of the SMGs are just “worse version of” as well, but that never means that you can’t damage the other guy in front of you anymore while blocking everyone else from playing the class that is key for advancing or holding on certain spots.