Did you receive a proof of security deposit received, including bank name and account number, for the first apartment? Did your $5k security deposit get transferred to your new apartment or did you have to make another security deposit? If you haven't received any communications regarding this money, it's time to ask management in writing where that money is.

Before claiming racism, is everyone else in the building being treated the same way? Spend some time in the lobby and observe how other tenants are treated. A new management company on site may be due to lack of performance/enforcement of security measures by the previous management company.

Elevators are notoriously finicky, especially in older buildings. Qualified elevator repairmen are in short supply and high demand. There is no upside for management to not have the elevators in working condition. They want them fixed as much as the tenants do I'd guess. If you feel this issue warrants a call to your local inspectional services department, do so. You may want to contact the MA Office on Disability for further information.