WTF is this ranked

I started ranked a couple days ago, haven't played since, and probably won't again this year. Firstly, I was plat 4, 2, 2 in seasons 5, 6, 7. I didn't play last year because the placements dropped me to silver and I wasnt gonna grind again. This year they drop me to bronze, which I can understand, I played like 10 ranked games last year.

So I was willing to "climb". I win my first 4 games, which should have been enough to get me to silver 5 since I was getting 70 LP per win. But oh no, this game you were your secondary role, so it's a separate rank ! (even though I had same rank for both roles). So now I have to play potentially twice as many games to even get to my ceiling? Because I have 2 fkn ranks?

Now i can understand why some people troll and afk when they are filled; not that it's right, but it's a fucking waste of your time if you only care about 1 position (let's say u are a one - trick).

And on top of that, I'm on my 4 game win streak, gotta hit that 50% right? So I get my main role next 3 or 4 games, and each is filled with HARD feeders. My worst score in these games was 1-3, but the others were 2-1 and 1-1 or something like that. Not outstanding, but its hard to have a good scoreline when my teammates are 1-8, 1-9, 2-13, etc.

Ranked I remember in seasons 4-6 or so, yeah sometimes u get some feeders and ur team is just the worse team. But it was never this crazily unbalanced. Seems like Riot just wants to keep people grinding. Well fuck that I remember now why I dont play ranked.

It's supposed to be an indicator of individual skill; and in some ways it is, but some games are wildly out of control when every lane but yours is feeding a kill per minute.