MMR for victories +5 MMR for a defeat - 50-200 MMR

It is almost impossible to increase your MMR. I get +5 MMR for 1 win and lose 50-200 MMR if I lose. How many wins do I have to get to make up for 1 loss? I can’t get to 5000 MMR+ and therefore unfortunately only play against worse players, which is why my stats are better than they should be. In the long run, it’s no fun for me or for the people I have to play against. It would be cool if you could find a solution for this. With kind regards Rome