Everyone in gold/plat are boosted ? EUNE?

Bronze and silver was fun and all , But now im in gold , my past 10 games in gold I lost almost all of them 100% due to my team.. now I know everyone in low elos say that , but I really do mean that. Example- I played braum support since no one wanted to go tank. My adc kept going really risky to trade with a CAITLYN that punished him hard.. Katarina lost lane 0/2 , its fine. nidalee got caught in her jungle , fine too i guess. When i engage and it seems like a really good fight my adc is just too scared to do anything and leaves me there. When enemy took first dragon , nidalee W'd into the dragon to try to steal it when there are 5 ENEMIES THERE , and just died.. then she dived under turret a sona who had her ult up ( I told her but she still did that..) In teamfights they would just fight 4v5 and not wait for me.. at all.. so they lost first 2 teamfights and then it was lost.. What did i take tank for then? wanted to go soraka , woulda been better. But my point is everyone in gold seems to be carried/boosted. there was a guy that said he can go ANY ROLE and do anything if we carry him , he said he was silver v but he played premade with a higher elo friend that carried him.. Some people in bronze are smarter then 70% of gold players .. its just sad how barely anyone has the ability to THINK. This is not based on only 1 game but yeah.. In that game we had a ryze top who agreed totally with me.. What you guys think? I CAN go to plat i know i can , i play decent and i am good at teamworking , making good calls , all that. but when it comes to 2 players in your team just feeding no mather what you try and help and roam and they just wont wait for you or go 1v5 its impossible. so i think i will just quit league for this sesaon.. it is not fun to play anymore.. The whole fun is only in ranked , and if you take that away too.. nothing left.. Well goodbye ._.