I was hard stuck in Emerald 4 in a similar situation and i focused on improving my gameplay and consistency, now i’m in Diamond 3 with healthy MMR - i also muted toxic players and tried to focus on having a good game despite losing, it’s important to reflect on what you did wrong and make sure to not repeat the same mistakes. I appreciate some games are unwinnable and there are trolls who will have a mental boom and intentionally feed but these games are few and far between in the grand scheme of things… If you improve your MMR will fix itself

This is pretty weird my dude, if it’s a thinly veiled attempt at humour you should know this isn’t funny (sorry?)

Nothing about a champion but I had a huge revelation that if you’re higher level than your lane opponent then your minions will also be a higher level with a buff increasing damage to enemy minions/reduction in damage from enemy minions. If you don’t believe me left click on a minion and check if it has a buff if you find yourself in this situation

If you’re trying to freeze or manage the wave then it’s helpful to know that you may be better off pushing!