Is this normal in diamond?!

So as you can see from the 2 pictures i took from my match history, it took me 8 WINS IN A ROW to get from 0 lp to promos in diamond 4. Is this normal? like how am i supposed to do that again 3 times? when i win i get a measly 12-13lp, but when i lose i lose 20-22lp. That's not okay lol.
Report as:
Offensive Spam Harassment Incorrect Board