So, what we have here so far. There are countless posts in the forum saying
Why I lost that game (or couldn’t won)
-I have better quality players * as I said, 1-2* and some times more, specially in higher levels cannot guarantee the victory
-My formation is proper (or opponents form. wasn’t correct) * this just gives a bonus but not guarantee either
-I watch the game, oppo wasn’t there * the same (and want to add here, ok, you were watching but did you make the right coaching ?)
-I had also supporters, ball possession and more shots * that also gives a bonus but not guarantee
-I always give bonus while oppo team is like abandoned * bonus maybe can give a +1,2,3 or 4% but not guarantee

I want to say here that the manager/team who’s playing with those conditions, in a long term he‘ll have successful career and titles.

But sometimes it’s about other things : the form of the players, maybe a bad chemistry of the team, good/bad day of some key players, right/wrong subs, excellent performance of oppo specialists (free-kick, corners), wrong decisions in orders (switch to attack/hard attack, hard tackling, wrong arrows, man-to-man) and of course the most important, bad roll dice of the game.