If anyone has any advice (other than stop playing Harbor, because uh, no) please let me know.
Don't get me wrong... I know Harbor isn't meta on most maps. But that doesn't mean he's unplayable—in fact, I find pretty good baseline value with him on every map. It's not that he's bad, per se, it's just that the optimal way to play him either hasn't been discovered yet or isn't very publicly available.