[XSleeper]

Might help of you backed up 4 ft so we could see the entire side clear down to the base.

 

[XSleeper]

So if you have a gap on the back left side all the way from the bottom to the top, it could be because the wall is bowed or the corner is not square and the back of the cabinet is hitting the wall before the side does. Or maybe you left some nails sticking out when you removed the baseboard. Or it could just be caught on the floor. Try lifting it up in the air before you push it back down.