Should I just say good bye to lol when u have lowest MMR?

My MMR seems around 400. It's very, well... extremely, low.

Probably because my over all win rate is 42%. (Bronze 4 77 LP / 130W 179L)

Luckily I have 80% mid win rate right now. (recent 20 matches; annie:88%, lulu:57%, janna:40%)

So I'm at last getting the idea of what snow-balling is, thanks to the youtube lectures by a former NA Master player, and dodging obvious trolls(, which is secretly encouraged by Riot).

But everything seems to be too late since I only get 12 lp for winning. At this rate, I have to play another 100 matches or so just to be Bronze 3. What is worse, it's very likely I'm ending up with Bronze 4 10 lp.

I think I cannot stand for it. I've already had enough casual lv.80 bronze5 players and afks. My friend list is also filled with those players having no interest on the current meta, patch notes, macros, and etc. (Avoiding these FRIENDS has no impact on matching quality.)

I know Riot doesn't want new players easily to be Silver/Gold at the first season. Since most players live there( and stop playing there).

I just want to play rather competitive games. But to play such games, my MMR should be at very least 600 or above, I suppose. I have no idea how long it takes.

Instead I can just buy a fresh account? See ya until the next season?

I'm totally lost.