I agree. Apparently he's conquered Earth 1 and chooses to spend his time in his abandoned mine evil lair doing evil stuff, like imprisoning some guy in an iron mask and poorly wooing Caitlin (although he probably had a better chance with Killer Frost, even though he killed her husband). And now he wants to do the same on Earth 2. Does he want to kill everyone? Does he want to enslave everyone? Or is he so psychotic that he has no real end goal or plan now that he has achieved his dream of being the number 1 speedster?