Her story with her in-laws gets a little sympathy, right up until she's complaining that the tenant is doing all these things to her and she "didn't do anything".
You served him illegal rent increase notices and you tried to evict him! That's not nothing! All the tenant has done is get the regulator in the loop, and the regulator has repeatedly said, "yeah, you can't do that." Flawed as they sometimes are, we have laws like these for a reason.