He's destroying for various reasons yes. But he knows how to build. Perhaps not personally, but he can wrangle a system to do things for him, mostly for him perhaps. OK completely for himself, but that's not to say he can't.
The book Why Nothing Works is worth a read.
The only thing he has ever directed that has been a net positive to society, Operation Warp Speed, is something he disowns because of the rabid anti-science stance of his base.