So far the worst outcome for landlords that you have posed is that they "realize that their investment was a poor one".

And yes, I want that landlord's grandchildren to be able to afford college (which I think should be free for all, paid for by tax increases on the rich).

But you have to admit that we're talking about vastly different worlds here, right?

What percentage of renters live paycheck to paycheck and are at risk of living on the street?

What percentage of landlords are at risk of living on the street?

What percentage of renters expect to be able to leave enough in money and assets to their children, so that those children can afford to pay college tuition for the renter's grandchildren?

I agree with you that dehumanizing people is wrong. I agree that landlords can struggle too.

I agree that there are worse people / entities that could own apartment complexes and houses.

But you haven't really convinced me that I should worry about the general well-being of the landlord class, or that it's worth my time and energy to chide renters who say mean things about them online.