I'm always fine with tilt when it makes sense, but unfortunately it doesn't make sense here. Level it.
Unfortunately when you level it (I tried myself but you said "not ok to edit photos" so I won't post it), you wind up with a lot of dead space that just doesn't work either. It's a tough framing of a very interesting subject.
I really like it very much but I don't think you can really salvage it unless you go for a non-traditional crop.