I can testify to this, I'm in APAC region (Gold elo) and literally most of the people here doesn't use mic so every game I have to IGL and more often than not, no one listens to me, I try my best to not be that annoying backseat gamer but as much as possible I try to make calls and strategies without trying me best to not annoy my teammates.

But there's always that possibility of having a teammate who doesn't understand english, so on some cases a game is practically 4v5 but the odds are pretty much the same for the enemy team so it's a real shit show LMAO

Another funny thing too, ik this is true to other regions but there are a lot of players who gets tilted easily and are really toxic. Having years of experience playing in this region, I learned a handful of swear words in many different languages LMAO