Is climbing in solo queue actually possible?

I've been grinding solo queue lately and honestly, I can't tell if I'm making any real progress or just running in circles. One day it's 3 wins in a row, next it's 4 straight losses with teammates who seem to be playing their first match ever.

It feels like I'm stuck in some kind of invisible MMR purgatory — win a couple, lose a few more, back to where I started. Over and over.

Is anyone actually managing to climb past Diamond solo? Or is the solo experience just too inconsistent right now? I'm trying to improve, but it's hard to tell if it's even making a difference when so much depends on your random squad.

Curious if others are going through the same or if there's some light at the end of the solo queue tunnel.