A few issues that I can see. Top of pavers are not level with solid ground. They should be recessed into the ground to support legs.
Sides look like they are bowing in. Is pool full? If pool isn’t full, the sides will now some until the water is high enough to push them out. BUT, if you aren’t level yet, don’t fill until you are.
Hard to tell if you are level all the way around. If you aren’t, you need to be.