Aight screw it, I'm sick of slowly dropping even when try harding my best champs

ADC (main): Draven/Vayne/(used to) luc Top (secondary): trund

this has made me fly from low gold to almost plat 3 , till I got concentrated bad luck teams that got me demoted to p5, went through 3 more promos to p4 but failed, and been still slowly dropping since. I wanna atleast change or add to my champ pool, maybe for top more, wether its cheap/simple champs or not, I want more impact and to win more. halp guys im thirsty