If your only goal is to raise your rank, every loss becomes painful.
TFT has games you can lose even when you play well. Your rank will go up and down.
So instead of focusing only on the rank itself, try to take one useful lesson from every game.
“I should have spent gold there.”
“With these items, I could have played a different line.”
“I scouted the contest too late this game.”
If you find one small thing like that, the game gave you something useful.
Improve one game at a time. The rank will follow.