Let me explain why (Some of you) get awful players in your normal games.

Your normal games mmr is completely separate from your ranked game mmr.

What that means for example is when you play at your very best and reach whatever level in ranked, that is not reflected in you fooling around or trying brand new champs out in normals. However, just because you are not as skilled on a certain champion or are trying new things doesn't make you a worse player, you still see awful macro plays and it's beyond frustrating to play in that. It would be better if for Normal games Riot raised a players average mmr in relation to their average highest ranked mmr.