Can't climb ranked matches

Lately, it's summer vacation and it's raining, so there's nowhere to go, so I just lie at home and play Mobile Legends. But I realized: 'If you solo queue for Mobile Legends ranked matches alone, it's really hard to climb. You win some, you lose some, you keep hovering around the same rank. For me, I reached Diamond, and felt like my hands were working well, so I decided to play one more game. But when you play one more game, you'll lose again. So now I'm hovering between Diamond and Platinum, and it's hard to reach higher ranks. But I thought that I can exchange Playio gems for Legend points, so that's what motivates me to keep playing.' Or maybe that's true, but I still sincerely hope that the Playio gem system can be improved. After playing 5-6 matches, I only got less than a few dozen gems. This feels really bad. You want to buy a skin, but you don't want to spend money, so you can only try to work hard in the game, but you find that you only get a little bit of gems. This feeling must be bad. (I played so much, can I get some more tips? 🙏🏻)