@Golazo2016 thats just wrong.
Been playing with Real, Bayern and Boca trying to make my own tactics, and i can honestly say not all tactics works with top teams.
With wingback tactic on Real i got fired half way down season sitting 7th, Bayern im currently 2nd but im 9 points behind Mainz whos leading the league, and my boca save, well i won the league, but just barrely.
Obviously teams with higher quality players will perform better over a course of time if factor X and Y is constant for all teams.
Some teams may not have the correct players for all tactics, thats why it's important when you pick a tactic, you also build it around what you want to accomplish. Dont jsut download every tactic thinking its plug and play with any team. Role familiarity playes a huge part this season, and if you stick a Uncomfortable AMR as Inside forward when hes Right footed, dont expect tonns of goals.
Try to build the tactic around you're strongest players, and maybe resoults will improve, OR Buy players suited for the tactic if you are focused on playing with the one you are using.
Good luck m8