What complaints do you have about overwatch competitive

I personally almost got to just under Masters then quit.
I felt like it were too much of a gambling machine, not that many times I have gotten games where I could say it was really fair from both sides.
Well, most games feel like you are either getting destroyed or it's just too easy.

Also, a lot of leavers etc, very toxic players the higher you get I felt like.

I will probably be back soon though, an amazing game apart from these things imo.
That ranking system just needs a bit of tuning tbh.