My problem isn't with landlords, because I can't remember having a particularly bad one. As someone mentioned, if you're a 'good' tenant you may have a better experience. However, I think that probably only applies when you're able to have a direct relationship with a landlord. When you're only able to deal with a rental management company, I don't think the fact that you're a great tenant comes into consideration.
My bugbear about renting in this country is the change in the law which made short-term lettings (6 months) the norm. Yes, it's right that property owners are able to have reasonably quick recourse to oust bad tenents, but in effect it's a licence to hike up the rent every six months or evict the current tenants and get new ones in. With 'good' landlords, happy with their good tenants, the rent may only go up once a year, and there may be room for negotiation. And, yes, I know, there'll be plenty of people who won't charge higher rents every six months, or even every year.
It's true that for many people renting is the best option but the biggest problem for me was that, with the six month leases, you were no longer renting a 'home', ie a place you could settle in and make yours; you were renting a space for six months and could be thrown out after a month's notice, even if you'd been a perfect tenant. That's the difference between us and much of the rest of the continent. There, if it suits you to rent rather than buy, it still feels like your 'home'.