I got very cocky and now my MMR is terrible.

I was in my Gold promos and delighted myself in playing with a few friends I met in the game through Discord, they were very low silver to even bronze. I tried my best to help them because I believed in my ability to help them - but instead I ended up losing. I got Gold Promos again and consequently lost that too. I was in Gold 3 last season, and I used to be paired up with people who had some concept of team work and desire to work with the team. But now I play with people who can't even critically think. I am losing vast amounts of LP per loss and it's starting to really get to me. I am on the verge of going down to Silver 5 at this rate and maybe even lower. I recently lost promos to get back into Silver 3 and it cut me down to 60 LP instead of the usual 80 LP I find from losing matches, this is absolutely ludicrous and it really pisses me off. Especially knowing that I don't talk with them anymore considering their innate hatred towards other people. I think I'm going to quit solo/queue soon as this is just unfathomable.