Losing too much

Last season i was in Silver. This season after the placement matches i got placed bronze 5 and i started climbing. I got to bronze 3 and i entered my promos for bronze 2 and then i started loosing so much that i got to bronze 5 again in a week. I don't blame my teammates some of the games wasn't my fault but majority was. I know am garbage bronze 5 player but can you give me some tips some champions or something that will help me get out of bronze or just something that will help me end my losing streak (sorry for my bad English) {{sticker:zombie-brand-facepalm}}
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