Does ball possession even matter?

[Killroy]

I am starting to wonder if anything even matters. Last season I lost a lot of games since all my players dropped in quality (8 players from 7-8 scores to 4-5 scores). I lost the forelast game against the number 13 of the league. I had over 70% ball possession and 40% more shots (max stamina, morale, bonus, watched the game, etc...). Still lost the game 2:0. So the next game I thought, I am going to put in all my replacements. Quality dropped like about 10 points or so. Some had red morale. Stamina was not max. No bonus. With this team I went up against the number 2 of the league (played the same formation as number 13 4-4-2). I lost that game only 1:0. Should have lost that one 5:0 or 6:0 based on everything. So that makes me question this game.

[t11_fan]

I am starting to wonder if anything even matters. Last season I lost a lot of games since all my players dropped in quality (8 players from 7-8 scores to 4-5 scores)...

Today I lost league match 3-2, opponent scored winning goal in 89'. Match was quite though, equall quallity opponents. After match statistics showed that my ST whose form was 8 got 4 rating in that match. How can some player in very good form suddenly get very bad rating?