If I can jump in here, based on watching my dad and my grandfather rent properties.
1/2. Risk is a big part of owning property. Liquidity of the property is also very important. You are vastly underestimating this.
3/4. As long as the right to own property exists, the right to exclude access to land that someone owns exists. If the landlord did not rent the property, then only the landlord would have the right to access it. Unless you deny the right to personal property?
5. In the sense you're using it, I have a "monopoly" on my laptop. It's one of those old Thinkpad X230s, and there's a limited supply. You're welcome to buy it from me...but there's also more on ebay. To call my laptop ownership a 'monopoly' is ridiculous, because you can go buy a different one, even though there's a limited supply. In the same way, you can go rent land somewhere else, even though there's a limited supply.
6. That's actually a big factor in deciding where to purchase properties that you want to rent out: do the local laws favor the tenant or the landlord? It can be so expensive as to be not worth the effort, when the laws favor the tenant. If you can't kick someone out until they've gone six months without paying the rent, but still have to pay for the upkeep of the property, then you want to be very, very careful that you find good tenants.
7. In what world to you live in? All that stuff costs thousands of dollars - even just repainting. And it's not just improvement, but upkeep. Plumbers are expensive. Random stuff breaking is expensive. Not everyone has the time or ability to do those things themselves.
> you are benefiting from a system which is rigged in your favor
See 6) above. It's not rigged; housing is a hard problem to solve, and it's expensive on both sides.
> building capital on the backs of people who actually provide value to the economy
Ever stayed in a hotel? Those provide exactly the same benefit as a rental, on a shorter time scale. Or do you not consider hotels valuable?
> The main reason [rent] goes up is because of the economy in a particular area.
The landlord picked a good location to purchase the property. Seems strange you expect the landlord to keep their prices down while everything else gets more expensive. The landlord is still providing value. If you don't like the prices, you're welcome to move somewhere with cheaper apartments...but a cheaper apartment will come with some downsides, too.
> not going to feel sympathy for parasites
I'd say a tenant who failed to pay rent matches the definition of parasite pretty well too.
Providing housing, whether a hotel room or an apartment, is a valuable part of the economy. You've given several reading recommendations in this thread, let me pass you something in return:
Look into what it would actually involve to rent a property in your area - cost to purchase, the building codes that have to be followed, the upgrades that have to be made (a lot of old houses have lead in the paint - that has to be stripped or covered); check out the effort it takes to coordinate with a rental agency to find a decent tenant, and look up the probabilities of the costs associated with bad tenants. It's also worth checking out how long the average tenant rents for, and the cleanup time and effort involved with prepping for the next tenant. Don't forget to check the competition - does the bathroom need to be upgraded? Maybe the houses in your area all have walk-in closets, and the rental agency says you need one too, to stay attractive. How much does the contractor say that'll cost, and how long will it take? Also check out the correlation between rental property destruction and income level - if you rent cheap properties for cheap, what's the cost of repair come to each month?
Final question. Did you decide to skip the above exercise, because it looked too time-consuming and/or difficult?