It is possible to climb, just not easy

I've been playing jungle 5 games in a row and managed to get a enough lp for my series to start, the way I was able to win was by not flaming when my teammates when they died or missed something, I just told them its okay we can still win and just try to be more careful. Flaming will not get you anywhere, it just tilts your team and makes them dislike you and reduce their will to win even more. When playing ranked, keep calm and remember that usually your team is trying their hardest as well.