You are absolutely right that corporations buying up all of the properties are the biggest problem, but I think the reason most people in this thread are irritated with the landlord from the OP is because they make it sound like they are doing the world a favor by leasing their own building.
Even if they aren’t directly profiting off of the rent they collect, like say for example they are simply breaking even each month, they are still indirectly profiting by having an affordable place to return to whenever they decide they want to move back to the UK again. “Where would people live if not for me?” is kind of a ridiculous claim, because either the tenant would take over ownership of the property or another investor would purchase the property and take over the existing lease if that weren’t possible.