Changing Tactics

Am i right in thinking that a tactic will decrease in effectiveness the longer you use it so the opponents will gradually do better and better against you? if so how much do i have to change a tactic for it to become effective again?

Not as a fact but in general other teams will try different things against you which could reduce its effectiveness.

I just came off a season where I scored close to 140 goals, even with my main man CR7 out for about 1-2 months of games.

The 2nd season I started alright, but after about 4-5 games I can't really get my shots in anymore. All my players had to blast them from range.

Many games I was only scraping victory, 1-0 or 2-1, even though I should be winning like 5-0 with the quality of my players.

Decided to change my entire tactic to a backup one and my next game I trashed my opponent 7-0, and now I'm winning more comfortably, often 2-0, 3-0 and 4-0, sometimes conceding 1 or 2 goals.

What happens to a lot of players is that the AI stop perceiving their club as weak, and start perceiving it as strong. Once that happens, they will sit back and counter, which makes them a lot harder to beat as a rule.

What happens to a lot of players is that the AI stop perceiving their club as weak, and start perceiving it as strong. Once that happens, they will sit back and counter, which makes them a lot harder to beat as a rule.

This.

If your tactic is good enough it won't matter what the other team do.