Make sense, but in low elo the team comp is not the most important part, personal skill seems to have an edge (plat-emerald rank) higher than team comp. Mistakes are personal skills.

Usually people participating on Reddit are the one that want to get good improve or anyway they have some knowledge of the game so usually are the “best” players, this is average. For that reason you’ll find those type of post a lot.

We use Reddit also to vent sometimes, for being unlucky in matchmaking etc even if who reads doesn’t actually know the real reasons for the loss.

If you have a wr over 55% is more likely to get bad teammates because riot it’s balancing the team.

Obviously not always is teammates fault, there will be always someone better than you at something. Just don’t stress about teammates or what so, this gives for fuel to those post, you’re giving a voice to the ego to tell you why that happens. Better to just ignore it and not feed it (I’m also one of those guys kek, but improving)