It is not unheard of for an installer to improperly install a pole.
The pole needs to be a heavy duty pipe, not a "fence" grade post. The pipe needs to be drilled and a bolt or re-rod inserted to prevent the pipe rotating in the concrete due to shrinkage. The excavation needs to extend below the frost line and the hole should be filled with at least three bags of concrete, perhaps more depending on soil conditions.
The bolts attaching the dish assembly to the post have to be properly tightened and final "aim" rechecked.
A pole mount, if properly done, is superior to a roof or wall mount.