i hate posts like this. they usually go:
i picked a good team with good players, but i picked my tactic and i'm losing with it, the game is broken.
The tactics are there for a reason, so change them if one doesn't work. Have a team talk, proper pep talk, play on a counter with a more rigid formation until your team gets confidence.
Just because the team plays in a certain way in real life does not mean your particular tactic emulates them exactly (due to attributes and AI), so you need to tweak it until you get it right, and have a backup strat for other formations, you can't just swing it by on one tactic, AI learns as well and will adapt to your tactics fairly quickly
Sometimes you simply need to bench or sell players that underperform in the game even if you have some special bond with them in real life. Make a new captain, bench vermaelen and see if that makes a difference.
THe possibilities are endless for you to try.