I have been playing since 2015 I've never had a problem just don't expect the impossible like some tanks have better armor in some aspects
for example if u choose to use a tank with a barley adequate cannon (kv1) against the example of one of the best tanks of ww2 (tiger) u will die almost every time (attack it from the back or side u have a good chance just dont be dumb)
play knowing only 50% of the time ur the bigger tank so pick a tank or tank destroyer with a bigger gun instead complaining about armor not working against OTHER TANKS