Canada

It’s those who exploit and who concentrate and consolidate their powers and properties at the expense of everything other than profit that are the problem.

Yes.

That could be a single person with 1 or 30 properties or a corporate parasite with thousands of units.

No. A single person with one property or any entity with 30 properties, never mind 3000, tend to exploit on my different scales.

Being a landlord does not inherently make one a leech (in a discussion with any nuance). And when you have millions of dollars to put towards gaming the system to extract as much money as possible out of tenants every year, lobby regulators, divert properties from live-in to short-term accommodation to increase demand, etc., you can be a leech on a much, much larger scale. You can screw over not just individual renters, but entire populations of people seeking apartments. Not all landlords are the same ffs. Also "better at leeching than others"?! You make it sound like you admire leeching

When your rental is owned by an individual with a second property versus when your rental is owned by a multinational company and is part of investment vehicle that pays (untaxed)* dividends to investors and has mandates to extract as much money out of you is very different things. *The people benefiting from rental properties being an investment vehicle (REITs) also want to keep this untaxed income (for being societal parasites) untaxed and thus perpetuate the housing affordability crisis for profit