Cosmetics are subjective; not technical nor objective.
In overall agreement with
@Archaic59 with respect to the "tucked under".
This:
"images online that has the same exact edge sticking out like mine. "
Who provided those online images....?
One of my "rules" is to never let form get in the way of function. Overall meaning being that if my computer works I am not going to be truly concerned about how the case panels, joints, etc. fit together. Or not.
However, I would not, and do not, accept a manufacturer's claim that some imperfection is a "manufacturing variance" to just get around poor design and/or sloppy production.
Especially if the product (case) I received does not meet my requirements and expectations.
What I would do is to look for some other product next time I need a case.