My winrate isn't even negative yet I am plat 5 and play often with gold 3s and 4s. I'm kinda confused. I didn't tank too many games at 0 lp, but it's hard not to now when i gain 15 per win and lose 25 per loss. Could someone explain this phenomenon?
Well, I don't know your situation, but say this happened:
Go 205-170 over your first 365 games to get to plat 5.
Proceed to go 16 / 37 over your next 53 games to be where you are now.
Your MMR is going to drop pretty quickly with results like that. Especially since once it starts dropping you're prevented from demoting to Gold until you've dropped a lot so you're in platinum but playing with weaker players and still losing more than half of your games (so your MMR drops even faster).
I didn't see how your recent performance has actually been. If you've got a negative win rate since hitting plat 5 though, that would explain it. Especially if you're losing games where your team is expected to win (i.e. your team has the higher overall MMR).
Getting carried every game might be a reason.
