I am at no point defending the game or the engine. I think for a major part, this game is in a horrible state right now. But it is still possible to win a huge chunk of your matches vs opponents who are A lower in quality (and skills) compared to your team and/or B are just not as active. By that I mean setting up formations or tactics according to opponents settings and of course train bonuses, which is also a huge part to separate active players from not active.
The odd troll happens here or there and that can be the problem especially with finals, where you only have 1 game and in this one game the engine can really be your main opponent. Like there is a chance in every game you play for that to happen, but in a league game it might not matter that much as you have 25 other matches to decide the outcome and other people will also face a troll at some point.
It depends what you are calling active. Not every 120% player must be active either, he can just not promote 1 or 2 times and there he is. I'm not here to argue, however I think your comparison is lacking, comparing the game with real life football just isn't possible. There are no real life teams without coaches in the first place. And what you showed is like 14 teams in one league all playing without coaches. So if this was to happen, of course one random team without a coach must be on top of the table, if the games are being played.
All I wanted to say is, that when you are in a low level with a low quality team, chances are very high you will be put into a league with many inactive teams. Because it takes you 4 months of playing to get there and a lot of players might lose interest in the game after that time. Not so easy to get to Level 80, you must have played the game for a long time and with some dedication at least. Of course also a player in Level 80 can lose interest in playing and is then inactive opponent for others playing there.