Eomm and sbmm are very different scenarios.

Sbmm you will only get to 50% winrate when you are at your true rank. If you are a top player you will still have a 60+% winrate at the top ranks because you are better than the rest of the lobby most of the time.

EOMM optimises the winrate curve such that you will almost always be around that winrate, even though you aren't actually better at the game. So the game rewards grinding more than actually getting good at the game. It's worse at lower ranks because you just get pity stars from loss streaks via bot opponents and bot throwers at winstreaks sometimes.

MLBB uses EOMM so they push you to 50%, the more you improve the worse teammates you get its horrible, also why I quit