A bronze that plays like a plat (Leaver buster)

As you can see from this infamous title, I assume that I could play with plats. Which in most of games I do indeed get a plat or gold in my games (Which I can hold or beat in lane against) however, I have noticed that the team I am matched with are sub par. I know that being unranked doesn't help my situation either but on the other hand always being matched with newer summoners is unfair cause I have been playing since mid S3 and has been following League since S2. The phrases "Why does my team sucks so much" as been shouting in my head for about a week or so. I got so frustrated with being matched with such bad team mates that I started to leave games, straight out for two days. Fed up with the matching but league is coke and the addiction is strong (Which I don't mind, I love league) that I will always come back. I got the "Leaver buster" for the first time (Didn't even know this existed) and the bad players became trolls under the internet bridge. I know that I brought that upon me though the bad players still existed before that. I always get a plat or gold against me with the rest unranked and my team all silver besides me. I am over here wondering, does league just have a grudge against me? on the other side, I could play ranked but I don't want to see me being 15 with grey hairs from this game. So what is happening to me riot? I usually carry with having wither the least deaths with decent farm in early and mid game or having been fed except I always lose (I have also come to terms with knowing I'm going to lose if I'm carring the team cause it means the rest of the team is either getting **** on or just not doing anything exp. not grouping). It's simple for me now that if I'm winning lane probably everyone else is losing their lane either cause bronze/silver don't know how to hold lane or play safe for ganks or that they are simply feeding. So does riot/league just hate me or from losing cause of bad team members destroyed my mmr to no repair? (I'm seriously thinking about boosting even if it's bad). (Friends would be nice but I have one irl friend that is good at league but he is never on. Seven in total that play league.)

(Sorry if anything is wrong, after three years of league this is my first post on the boards. ) (misc. Cause I never post and don't know where to.)