These parking spaces are reserved for coaches. That should have been obvious from the sheer size of them. You shouldn't be parking in them at all, but if you do, it's absolutely unforgivable to park over the lines when you have so much space to aim for. As you can see in this picture, this clumsy and careless parking attempt meant that one of these coaches had nowhere to go, so it did the right and decent thing. It parked horizontally, and blocked the thoughtless driver in.
This is likely to be a bigger problem than just being blocked in by a regular driver. There's no guarantee these coaches had anywhere else to go that day. They might have been there overnight. That leaves you without your car, and with no means of getting it back, until the coach drivers return to move them. This awful driver inconvenienced them, and now has to deal with a much bigger inconvenience in return.