Is it time for me to quit?

I have been playing league for almost 2 years now I think. S3 was my first ranked, I finished in silver. The start of this season I won 7/10 placement and was put into B2 or B3. Quickly I went up to B1 Almost was in silver then literally lost every game down to B4 and spent most of this season there.

Story of the season for me is for every hard fought 55min game I would have, the next game I would have an afk or someone who doesn't listen/feed. Now all that work is completely undone by something out of my control. A lot of people tell me that if I deserved to be out of bronze I would carry my team, but if I am 2-0, I am most likely not going to be able to take down the 6-0 that one of my lanes fed.

I guess the fact that whether I win or lose is based on what teammates I get than my own skill, really takes away the fun. Being in the lower brackets, while I take the game serious most people have this attitude "W/e idc this is bronze, not like it matters". Constantly dealing with trolls/afks/feeders has made the game more about dealing with stress and controlling my temper than enjoying the competition. Now that it has become that way for me is it best to walk away?

I know this was a lot, but thank you if you took the time to read this.

**One last thing, are people who are not from NA actually supposed to be able to play on our server|? I can't even play in the mornings anymore because I usually get a team of people who speak broken English or even none at all.