how to get past gold

Hi guys, im not the best player of the world and i know it but i think that i now a bit how to play this game.

I was gold 1 (both tank and dps) start of the season now i cant get past gold 4.

Sometimes i play really bad to cuz we are all humans and its still a game afterall, but i lost past 4 games being the only one doing literally something my team mates were just flaming and going solo or idk what.

Its really frustrating cuz i got max damage and max kills of my team all latest games but im still not going anywere with my rank.

i want advices from tyyy