Anet A8 adjustment for Y-axis and printer leveling

I've had the problem the floor on which the table for the printer stood wasn't leveled. Which led to corners at the z-axis which haven't had 90°. The same happened at the y-axis, because the threaded bars are bent.

If you just have a problem with a bend y-axis:
Parts List:
Wooden board
10x screws for wood 3x12
1x M3x30
2x washer for M3
1x nut for M3
Angle profile length ~240mm

First cut the angle profile in two parts of ~62mm length and two parts of ~50mm length.
Drill in every pa