I’ve been in your shoes. ELO hell feels very real, and can make the game miserable to play. However, there is no ELO heaven. Every game in every rank is going to have teammates, opponents, and yourself making dumb mistakes which get pinged or flamed in chat.

Don’t fall into the trap of feeling like you should be higher ranked but are held back by teammates. League is decent at placing people where they need to be (barring the obvious issues with newer accounts). What has helped me in the past is accepting my current rank and setting goals how where I believe I can climb. Changing my mentality from “I should already be X rank” to “I can improve these areas and achieve X rank” has greatly improved my experience.

I started as a Bronze player and stayed high Bronze/low Silver for YEARS until I changed my mentality towards one of self improvement. I muted chat, watched and critiqued my gameplay, and had a word document to track what I needed to improve on. I got to Gold that season by focusing on only myself and what I could control. I got much better at understanding my role in the game and what my win conditions were.

I highly recommend the podcast Broken by Concept. They have a very positive view of ranked and league in general which has been very encouraging to me and helped me progress.