Am I doing something wrong?

I peaked plat 3. Then I lost 8 games in a row. For the last week I’ve won only 4 games and rest are losses. My playstyle didn’t change one bit. I know I am the factor at winning, I know that it is probably “my fault” for losing, but you can’t convince me that losing almost 90% of my games is not intentional. When I first demoted I managed to reach Plat for a second time. I queued and the lobby was weird as it had silver 2, gold 4…That might mean my mmr dropped.

I feel extremely demotivated at this point…I don’t know what has changed. I main ADC and most of the time I win my lane. I would accept some insight but pretty much ADC I whatU play since 10 years. (10 years and plat peak lmao, I know.) I can play jungle as well but I don’t really feel confident queueing ranked.