My rank increased to gold without ever playing ranked

So for some reason while playing with my friends we started getting insane lobbies that were way above our skill level and after we tested it by all three of us solo queuing we found out that it was specifically me that would get the high lobbies as seen in the attached picture and more than that, I apparently rose up to gold rank even though we never play ranked. 
After checking, I did play a few ranked matches in season 5 and 9 but both were at the lowest rank possible and less than 10 games each season, this is also eons ago and I've been at the lowest rank forever since i don't play ranked.
In this current season, I played a single ranked match just now to test if ranked was some how also messed up and would put me with higher skilled players but it wasn't(It put me with other gold players but they were obviously way better than me since I am not gold myself even though the game tells me that I apparently am) so that's fine.
I am currently wondering what happened to my account to suddenly put me in gold rank and raise my matchmaking rank in regular unranked matches and leading to insane skill distributions when compared to my friends as seen in the 2nd and 3rd pictures attached and how to fix this issue so I can enjoy the game again at me and my friends' skill level.