Some replies her are a bit ott, the guy might be cheeky & massively over stepping boundaries, but he's very unlikely to be an axe murderer.
I'm no push over & I would really struggle to live with someone who'd disrespected me so much when first moving in. That does not bode well at all & though I could easily stand up to him on my own, but I just would not want that sort of hassle in my personal space
His rights are minimal as I'm sure you know, so he's either misunderstood & thinks he's a tenant in a house Share, or he is a bully who thinks he can ride rough shod over you.
I would sit him down & tell him that...
he has overstepped the Mark by making changes to your property without your consent (alarms/doorbells)
Refusing to stick to rules already laid down re his allowed kitchen storage space, refusing to correct his mistake when asked. (Dump that shit in his room)
His loud music with door open isn't acceptable in a closely shared space, will disturb the neighbours & has already disturbed you. (Headphones you antisocial fuckwit)
Turning the TV on in a room where you are sat quietly eating, & isn't really intended as shared space, without the normal politeness of asking if you mind, is at best bad mannered & unacceptable.
Etc etc
Personally I'd give him notice, but be very clear that he sticks to very clear rules between now & his leave date, otherwise you will be forced to reassess & hell need to leave sooner.
Good luck, I hope it goes well