That's not true at all.
I move around a lot and have rented from some great landlords in the past who kept the price low, property in great condition and couldn't be more helpful when I've had problems. Granted I've had some awful ones too, usually big companies, but it's definitely not fair to say there aren't good ones out there.
I get that the world likes things in absolutes, and it's easy to say that landlords are parasites and shouldn't exist .. but that neglects that not everyone wants to put down roots or go through the property of buying and selling a property every time they move. I'm definitely not defending the big investment companies who are just there to monopolise the market and squeeze every penny they can out of it, but it's the same with every industry, there will always be bad actors who will exploit the system if they're allowed to.
Keep a daily diary, starting on the first day. Just write the day number since the breakup, and one word to describe your overall mood (I usually use Good, Bad and Meh). First few are going to be rough, but you'll be surprised how quickly you start seeing a pattern of more good than bad. When you get 3 good days in a row, it's time to stop keeping count. It'll happen quicker than you think.