In the UK, stuff like running water is a requirement that the landlord must supply, and failure to do so would be grounds to withhold rent.
Aggravating. In my home state in the US, failures to maintain the habitability of rental housing is grounds to withhold rent.
Again, on paper, I'm sure both of these could be legal grounds to withhold rent. Buy I feel like you're overlooking the relative power between the two parties, their relative situations (and precariousness), and what they have to lose.
A friend and ex-co-tenant of mine recently moved rented accommodation, and the new landlord had failed to arrange the heating and certain other electrical necessities in time for moving in. He stated that he wouldn't be paying full rent for the period in which these weren't provided, considering that they were a part of the contract.
The landlord responded with hostility, of course. And who does one complain to? There is no functional regulatory body. If the landlord chooses, they can evict. What can my friend do? Withhold a bit of rent, so that someone who earns 40,000 earns only 38,000 instead? He just had to accept it.
He has no leverage. Tenants are in the position of just having to fucking accept it.
I moved flat in the last month. I agreed with my old landlord that I could leave a small number of items (vacuum cleaner, blender) in our old flat until I secured a new one. I've now been informed that my possessions have just been thrown away without notice. There's nothing I can do. And this is the treatment I'm accustomed to, as a London tenant. Past landlords have treated us with a similar (and occasionally literally criminal) lack of care, but I feel like I have no recourse.
Yes, I'm bitter.