The thing is you can come often back from seemingly impossible situations, if only you can get the team to work together.
I had one such match where I called out one of the main damage dealers twice for diving in and leaving me exposed, as a healer, to ganks, which the other team was quick to exploit. My communication lacked the necessary clarity, and not long afterwards, we’ve got the best player calling out an assassin for a stupid death, and then going on to berate the team.
I stepped in again, asking to drop the negativity, but also advising the assassin against walking into fights with impossible odds.
Kept healing my team and keeping them alive, and we worked together, leaving behind the toxicity, lo and behold - we came back and everybody was congratulating everybody else.
In another match I was handed a team of losers (seriously their W/L was appalling) with a couple of assassins that won’t do objectives, and who seemingly thought the game was all about killing opponents with little consideration for their own deaths.
Again, with a modicum of communication, we were able to bring the game within inches of being winnable. The other team’s better coordination, and excessive eagerness from my own, led to victory being snatched from us at the very last moment, still it was pretty cool while it lasted.
In another couple matches, I was Sylvanas and set up a mute communication with a Tychus: the other team wasn’t smart enough to handle the split pushing effectively, while the rest of our team was decent enough not to get pwned non-stop.
In the second match, the rest of team wasn’t up to the task, and Tychus became over confident and began ignoring my cues, after the easy victory in the previous match. So we got #rekt instead.
Long story short, communication and coordination win games, under certain circumstances, I would say they can definitely overcome the (lack of) strategic and mechanical ability of the team.