“I think they’re sabotage.”
At this point, I have to agree.
No, this looks like an integrity failure, not maintenance related (although maybe revealing a flawed inspection process).
Maybe. Though that picture looks like the panel has been patched, you can see different shades of paint and what looks like primer. It is torn in a very odd pattern e.g. not along a seam or bolts.
A wheel coming loose could be sabotage or just poor maintenance. That rip in the sheet metal requires more explanation.