Riot please

https://gyazo.com/648a02171a94866ad5ddcf92266394be https://gyazo.com/e12997e0a2be0a5e2934d969c764337d https://gyazo.com/c0da9331fb729babd4cb4744f7fd0fa7 Why am I losing this much? Is Riot punishing me for winning too much before so they're trying to equalize my wins and losses? I had 53 wins over my losses but now I'm at 30 like how does that happen I haven't struggled in the past 500 games and all of a sudden it's constant where I get someone 1v5ing at the last fight or someone saying "I will make sure you lose this one" because I accidentally stole a kill with snowball