Parts: Aorus Elite X570 ATX motherboard, Silent Base 600 ATX case
Pics: https://imgur.com/a/2JyRGmG
Problem: I'm trying to fit a motherboard into a case, but can't get all screws align to standoffs. The case doesn't have normal standoffs, instead there are heightened bumps in the design (see pics). No matter how I wiggle, some screws just don't align. They are close but not close enough. I suspect the problem is the integrated IO -shield of the motherboard. It has steel strips left, right and up, and it doesn't feel like that it sits nicely in the case opening.
The middle standoff number 5 is a odd one. The bumb is lower, than the rest and originally it had a screw sticking upwards. Googled a bit and seems that it's there to help you anchor the board. First I blamed that standoff and I took the screw off so that it doesn't hinder my wiggling attempts, but that didn't help.
Best I've managed is to get all screws attached except number 4 (and 5 that doesn't take a screw anyway). However, in that attempt it seemed that number 4 was also aligned just right, but the hole was not resting on the standoff, there seemed to be a gap, and as the screws are short, couldn't get number 4 screw to reach the case. Tried to push the board down, but it didn't help. Feels odd to me that while numbers 1 and 7 are attached, number 4 is not resting on the standoff?
In the last pic, the IO -shield is visibly aligned too left. I've managed to center it a bit better that in that pic, but in general it seems to want to sit more to the left than in the center.
I've used reasonable force, wiggled the board around and tried to make the IO-shield snap in somehow (which it really doesn't do). Nothing sticking out below the motherboard. It's my first PC build, what should I do next? More force? Bend the IO -shield's steel strips (in which direction)? Take off the IO-shield (don't know if warranty allows that). Attach with only 7 screws (all but numbers 4 and 5), call it good and go on? Remove the backboard of the case to see if the IO-shield really is the culprit (not sure if it is removable anyway). Any advice?