Is a loss really worth it?

So, i've been playing league for some time now, years in fact and I just recently began my ranked climb about a year or two ago. On my main account, i've experienced a considerable amount of trolls or just plain out bad players, and the thing i always say to myself is, why can't i be on the other team for once where everyone dominates their lane and not only me. I have a second account which i recently started and i've been playing ranked on it because i've told myself that i need to get better at the game probably and thats why i am just not helping my teammates properly or something to win games.... I've encountered the exact same problem here! I've lost 4 games in a row where i won my lane by a substantial gap, and i use this lead to help losing lanes, but at that point my bot lane has fed 15 kills combined, my jungler is not helping and is also dying in their jungle and my top laner is on their own island getting dove and whatnot... i shrugged 1 game off saying to myself that, hmm maybe it was just a bad game, then it happened again and again, the same thing like clockwork.... and i thought about the elo and maybe the players are just plain out bad, but then what about the other team? they are in the same elo and they stomped so why do i have to be matched over and over with unskilful players when clearly my kda and overall statistics in my games are not lackluster. Why am i continuously being held back while other people experience the luxury of actually being able to play the game and not have their time wasted over and over again... for something that is utterly not their fault. I just don't understand this matchmaking system that is supposed to be fair when it is clearly not fair to me at all when i show performance that outmatch my opponent. It is truly frustrating and i wish i can just stop playing this game plain and simple but i actually want to be good at it, i watch pro play all the time, i see the things people are capable of and the recognition they get from it by streaming and otherwise. I want to be able to play league of legends!!!!