100 out of a 1,900 rent really isn't that bad. My first year in a 1b1ba apartment in Glen Allen they tried to raise me from 1,100ish to over 1,200. I talked to a person in the front office and they changed it to like 3-5% and that was the yearly adjustment percentages they sent me the next 2 years I lived there.

With my case, my rent went towards front office staff, maintenance staff, landscaping staff as well as costs of the property. All of those staff expect annual raises. You should expect an annual rent increase if for nothing else for property taxes. Have you seen some of the posts on here of how much people's property taxes jumped?