I stay here occasionally, it's a very pleasant hotel (like most HGIs - basic but those basics are done right) and it's usually priced very reasonably for it's central-ish location. I find the rooms to be normal size for European city hotel / HGI, I'm wondering if you maybe got a bad room for some reason? Bathrooms are on a smaller side indeed.

My only criticism is a very weird lighting setup in the room.

On the upside, this is one of the very few Hilton properties with Chromecast. A miracle!