I'm very unhappy with the only ISP option I have in my apartment. I'll get (physical) spam from other ISPs that don't even offer service in my building, and around once a year I check a ton of common ISPs to see if they've added service to my building, but they never have. Meanwhile, every few months there will randomly be outages in the middle of the day for a few hours, but they always claim after the fact that the outage was shorter than it actually was so I don't qualify for any refund. The one time I tried to chat with their customer service they lied to me about it and then somehow the message asking me "is there anything else I can help with?" didn't show up until several minutes after the timestamp that it showed, by which point it came with a follow-up saying they were closing the chat due to a lack of response.

Maybe your building has an exclusive contract with the only ISP available.

That was the case with our last apartment. There was AT&T fiber running in front and the building was wired with cat5e. I can almost guarantee there was an AT&T fiber ran to a wiring closet somewhere but Spectrum (cable) had an exclusive servicing contract.