I think some people are suffering because there are lots more AECs out there, they were excellent against light vehicles before the patch and went from pointless to reasonable against infantry.
Saying that down in the basement at rank 1 I can't remember the last time I played an OKW match, as the Brits I always seem to get Ostheer which statistically could mean they are struggling. Anyone who plays against me is probably on a loooong losing streak.
I'm seeing a lot of Ostwinds and very few Paks, which might be the problem.
Valentines are a lot tougher, can crush, have truly excellent smoke and come out at about the same time yet I've never seen anyone complain about them.