IDEA : MMR should reset after 2+ seasons of not playing.

Hey, so I was playing the best game ever aka League of Legos and I decided to play ranked on one of my accounts, I was duo with another person but this account was Bronze 1 in Season 4 (4 seasons ago xd). We went 10-0 and all of the matches had Gold 5 MMR, my friend's account was fresh so he got placed in Plat 5 but I got placed in Silver 3, I know that my account wasn't fresh but 4 seasons is a lot of time for the MMR to reset, am I the only one that thinks MMR should reset after 2+ seasons of not playing? Because I personally don't have the patience to climb from Silver 3 lol, so I'm gonna throw this account away and move onto the next one.