Scared of playing on my main...

Hello there, i climbed fast and easily from g3 to plat 1 by abusing vladimir and just doing a few things like watching minimap constantly, pinging at teammates and avoiding earlygame ganks but when i reached plat 1 for some reason i stopped focusing. i lost like 4 games in a row and right now i'm really scared of playing on main. I'm just playing on my smurf but i feel like my skill is getting even worse. Have you guys ever experienced this?
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