Statements 1) and 2) are your personal opinions of the food, and
so ought to be okay. I've seen far more scathing food reviews than
that, though I think you might want to leave out that part about
the c*ckroach powder.
Statement 3) may be construed as defamatory by some more sensitive
people. Maybe saying that you don't like his attitude is fine, but
saying that he's an 'ass-face' definitely isn't.
Bottom line, if you ain't comfortable with it, then you may not
want to post it.