I’m currently a home owner and not a landlord, but if I would become a landlord, it wouldn’t be in my power to implement any of your solutions, leaving in the middle whether they have merit or not.

It would be in your power to set the rent. If you set the rent at the cost of maintenance + any other recurring costs, then yes, it’s totally fair. If you set the rent such that you make a profit, you’d be earning money for doing nothing.

Like, I’m just a wage slave myself and there’s literally over 250k of my own money in my house … why should I have to give that away for free?

The property that you worked 20 years to pay off and 10 to pay the down payment for is yours, you get to keep it. You don’t have to give it away for free, you’ll either sell it for a fair price and keep that money, or your heirs will have it. All that the opponents of rentseeking and landlordism are asking for is that you not use the property to make profit between now and when you sell it or die.