Bed mesh, frame or bed?

Hi,
If anyone is able to come with an idea I feel like I am going crazy, in the last 4 hours I tried to fix it but I can't realise what is wrong. I know about the yt video about square frame but It doesn't say anything about motor side being uneven, in the picture I draw an "M" for each motor.
Please guide me a bit as I feel like it is a dead end.
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