So question: does anyone take personal responsibility for a loss or poor performance or is it "shit team gg noobs"?
As someone that considers themselves a poor to mediocre player, I'm always considering what I could have done differently that might have lead to a better outcome. Rarely, though it does happen, do I simply write the team off as a loss - usually has more to do with comp for skill level.
The responses aren't mutually exclusive. I can label my team mates as trash and evaluate what I myself, did wrong, at the same time. I always try and get better, but in fairness, I'm the guy picking last so that I can fit the team comp, not the guy selecting our teams second Widow Maker, so I think it's reasonable to place a greater proportion of blame on certain players.
It's easy to suggest it's simply differed responsibility, but there are instances when it's clear that they are not helping. I'm not sure what their intentions are, but it seems common that they do not align with us attaining a positive match outcome. That's the difference between a lot of players. It's not their ability that's screwing your team over, it's the fact their mindset, they do not care about match outcome, they just want to play x character because it's the character that they usually play or especially like playing.
I can't help shift the feeling that if that's your mindset, if you just want to do your thing and have fun with your game doing so, then this isn't the game for you. The way that it's been built creates a huge dependency on thoughtful interplay between teammates, and if you're not accommodating that with your decision making, then you absolutely deserve a large portion of the blame.
That isn't to say that I am faultless. If my selection doesn't fit the team comp, suggest an alternative, if I could have done something better in some way you think I might not have seen, then tell me. I'm always willing to work together to achieve our mutual goals, and ultimately it's not the fact that we lose that bugs me, it's the fact that many of these players and I don't share those goals. If we give it our best and lose then we have the opportunity to learn from the experience as players, but if we don't I feel like there's a lower capacity for that. I'm forced to adapt into playing with a team that don't want to play together, using a playstyle that isn't consistent with a high level of play, and is ultimately useless. For instance, in that Numbali game I mentioned I switched from Reinhart to Mercy so that we had a support, but I had no tank to support and had to dart between 5 players with their own agenda. Regardless of how I played in that scenario, most of it didn't help me develop as a player, the strategies I was forced to adopt to adapt to this uncoordinated team aren't consistent with what I would need to do to play Mercy effectively within a decent team, therefore their uselessness degraded the match quantity both in terms of its outcome, and in terms of its value when seeking to develop as a player.