I watch literally every game in my save in full. Reason being, I like to enjoy the journey, rather than watching the odd highlight and going on holiday. The save takes longer and you’re not 10 years into the future in an instant.
Anyway, the point I wanted to make is, by watching every game I can clearly see where my tactic is not suitable or requires tweaking, depending on the oppositions approach.
I recently posted in another thread how I finally managed to get the better of Bayern in my Dortmund save, altering my approach to counteract theirs. I knew what I had to do, I just wasn’t aware that pressing worked the way it does in FM23 - weirdly I’ve won loads without even knowing this.
So in my opinion, by watching every game (I know it’s not for everyone) I can see exactly where my tactics don’t work, most of the time it does, but occasionally you have to alter in game to combat oppo’s strengths or exploit their weaknesses.
Game management is hugely exaggerated in FM23 too, so you also need to be good at closing out games, particularly in the last 20 minutes or so.
My advice would be pay more attention and enjoy the journey, rather than wanting too much too soon.