hot water on shower rigged to get cold after 10 minutes

I was ok with it at first but I did some testing with other water in the house like the sink in the bathroom and the sink in the kitchen. The shower is the only source of water that does not get continuous hot water to it. It seems purposeful. If I'm paying $2k for rent (east coast USA) I feel like I should be able to take a long ass shower if I like. I pay for the gas water heating.

I feel like the landlord did it to keep water bill costs down but fuck him I'm staying in the shower just as long as I want (kinda getting used to cold water showers).

Anyone know if there is a certain amount of time that water should be hot for in MA? Would be much appreciated.