High ranking player advice?

I play triple stack xbox ranked it feels from my perspective that my other teammates fail me. But that can't be the only thing slowing my climb. I'm currently gold three, if someone good at the game is willing to match review some of my matches and give me some criticism on some things I can improve on to be a better player I'd appreciate it immensely. I'm a full flex player mostly tank/support but I switch to whatever is needed.