so i was just playing a game as a solo queue and we were winning and my whole team surrendered on me

And?

What are you looking for? The Boards can't do much except advice and a bit of sympathy.

Report them, and send a support ticket for context. That kind of griefing, especially if it was a four-man premade, is not okay.

You probably felt like it because of your kills, but the rest of your team was way behind. I wouldn't have surrendered, but I wouldn't say you "were winning".

Yeah ive had a team surrender because they didnt know everyone would really ff