Now before I get started on this, I need to point out that PCPing a car is not my idea of getting a good deal nor the best car for my money. However, I do see the attractions to some.
Most of us on here, when looking at requirements do not particularly place much standing on things like "newness". However to some people this is something that they do look for. Newer car, lower mileage, in warranty etc. etc. Yes if you are savvy you understand that these things can be managed in other ways like 3rd party warranties, ensuring good service history and condition etc. But while we disagree with the OPs finance method and what he's renting for his money, you must understand that to some a fixed monthly outgoing for a car that will throw up no bills except consumables and servicing (and even that can eb fixed on a new car with certain marques) must have an attraction. You get a relatively hassle free experience. Some people want a fast car, some want a big car. Wanting a new car is not so different, but we don't see it that way because it isn't important to us.
This is the way our society is. Don't save, rent things etc. This isn't particularly new. Credit cards were available in the UK long before in mainland Europe (where they strill aren't as popular). Radio rentals was hiring TVs long ago and now that's been replaced by high interest credit. For what it's worth, provided the OP isn't stretching himself, and doesn't mind being locked in to driving a bottom of the range Scirroco, then he's not doing anything the majority of society does and fair play to him.