The landlord is the one cheating. They are likely earning a kickback on those included internet plans. Your landlord could have said no. Sadly it’s pretty common for multiunit rentals to be locked in to just provider.
Not that ISPs don’t usually suck. When AT&T Fiber lit up in my neighborhood in 2022, magically Spectrum was able to offer faster speeds at lower prices. Though sorry Spectrum, I prefer my 300mbps symmetrical to your 500/20 service.