For dimmers, you either need smart bulbs that do it themselves or a dimmer switch that you know is guaranteed to work with that bulb, it's tricky. Also, LED lights that get warmer (change colour tone to a more orange colour) as they dim are far more pleasing than just dimming since they emulate what incandescent bulbs do. Sometimes if the power supply to your unit or building is choppy leds are the first to show it, so hope it's not that.

Good luck with your landlord, let's hope they're a good one.