Hi!
First thing to know about Football Manager is that its limited. It might be by far the best sport management game, but its still really limited.
Second, 3D match engine is inaccurate, there's simply not enough animation to cover everything thats happening.
Regarding Match Engine, it really favors fast paced attacking football. Thats not me saying something else won't work, but you might have harder time making it work. Give your tactic time, your players need to get used to it and sometimes it takes months for it.
When making tactic, follow the basic rules:
-Player roles: Don't use 3-4 playmakers. Try to balance things out with them, because playmaker is someone who you want to most on the ball. Deep lying forward, False 9 and Trequartista are all forms of a striker who's also a playmaker, playing with the Advanced playmaker behind them is usually not ideal
-Depending on your style, adapt your player roles even further: If you're playing on Attack, then you need to put more players on attack. Somewhere between 4 and 5 is usually the sweet spot. Be careful, if you commit to many players forward, you'll be exposed at the back. And if you don't have enough players going forward, then chances of creating and scoring are minimal.
-Be patient above all. If tactic does not work, don't try radical changes. Try changing one small thing before changing something bigger. Sometimes even the slightest change of tempo can change the course of the game.
-Hire good assistant manager/coach to give you tactical advice: They usually give pretty good advice on how to adapt to something in the game.
Alright, thats all from me, hopefully I managed to help a bit.