The true only two ways to climb
1-Keep a calm head, no one wins when tilted
2-Find out what you are good at, and perfect that talent
Fact is good players climb, mediocre players don't. Some people think being mediocore is good enough to climb, they make posts "i normally break even". All I have to say is "breaking even" is not good enough. Find a champ you are good at, find a talent you have in the game, be it map awareness, pure raw mechanics, or your ability to lead and shot call. Find out what you are good at, perfect it, and eventually you will climb. Find out what you are good at and be the best at it. Being above average is not good enough, to climb you have to be great.
Screw the whole fox drop "how to get out of elo hell" videos, they give good tips, but fact is to climb you need to be flat out great. Sometimes you will get lucky and get good teams, but eventually your luck will run out, and when this moment happens you better be ready to put on your faker pants.