Morris, I'm sure that changing to Dev V11 won't help because if you use Berserk with setting the man marking then you can be sure that you get 99% of possible performance from quality players you have. The amount you conceded is connected closely with the general quality of your players because if your players can't keep ball in attack and they lose it very frequently due to bad attributes then obviously your opponents have more attacks and counter-attacks against you and more scoring opportunities. I notice that people very often misjudge the quality of their teams and that gives them false expectations and causes frustration.
Btw, If you have correct judgment about the quality of your team and right understanding about what result you can hope to get with such team then you'd never be frustrated by this game and you always will be knowing where is the problem in your tactic or in your players' quality.