That leads me to conclude that your current lease expires at the end of this month.
If that's the case (and the apartment isn't rent controlled) then the landlord is free to raise the rent as he sees fit.
No, it's not retaliation, discrimination due to marital status or harassment.
And, by the way, all your other complaints about the place boil down to this. If you don't like the condition, status, or term, then find another place to live.

