Yeah, Square has a long running history of crappy PC ports dating back to the PS1 era, and this is another lazy, shoddy port to be sure.
But who knows? They're still porting the other two games so when they see all the negative feedback regarding these specs maybe they'll patch it themselves? Not that I'd hold my breath (again, this is an SE PC port we're talking about) but it's not beyond the realm of possibility.