Blocked in diamond

Good morning

I would like to know if I'm the only one having trouble getting out of the diamond, I feel like I'm deliberately falling against teammates with:

• Either a MUCH higher level (mythical or legendary)
• Either MUCH inferior (personal with little stuff)

I think the worst is when I approach a higher rank, I'm sure before I even start that it's going to be my worst game!

Maybe I'm just bad too, I don't know