Where my nieces go to high school they have an entire Instagram page dedicated to calling their fellow students who park horribly in their lot. It's pretty funny to see some of the posts. I get that backing in can be a bit difficult at times, but with the new cameras and if you learn to use your mirrors, it shouldn't be that hard. I've gotten quite good and using my side mirrors for everything after 15 years of hauling a travel trailer.
Reverse parking is easier than front parking as there's cameras that can see the road and the rear of the car, some with front cameras also, but that aside, this car park isn't a reverse park only car park. The person was just being a wanker and didn't care he/she took up two parks...an entitled fuck stick.