It would be helpful to know the “daily routine” and how you and potentially others interact with him day to day. So many rabbit behaviors that owners find unpleasant can be very contextual and shaped by the environment.

Hmmmm, the change in the last few months is what jumps out to me. Have there been any changes in your household?  Did this happen to coincide with covid-times and everyone just being home all the time?

The only other thing that seems like it might be a trigger is that he goes traveling with you a lot, and you tend to rearrange fencing sometimes? Maybe this is enough to make him feel the need to re-mark and reestablish territory?

The typical advise for loss of litter training is to restrict the space a bit. It also seems like he is very much trying to claim the entire house as his (chewing things is also a way of marking). Restricting his space would also help as you could bunny-proof that area better. I know some people will secure pieces of lumber over their baseboards etc so the buns can chew that instead of the wall.

I agree with Dana.

Also, if you are telling him “no”, be sure to redirect him. Pushing his nose to the floor isn’t going do anything except make him mad. So if he is chewing the carpet, for example, tell him “no” and then physically redirect him to something more appropriate. I’ve also had a lot of luck with putting something heavy on a chew spot. After awhile, they will “forget” about it. Covering baseboards with wood or cardboard is also helpful. Keep in mind, bunnies really like something stationary to chew on. This is why chewing baseboards, etc. is very attractive. So perhaps he needs some chew toys that are stationary and cannot be moved around.

As for the peeing, it does sound territorial to me. Perhaps the inconsistency within his environment is contributing?

I had a problem with my bunny drinking a ton and peeing a ton and was really bad about using her litter box. She also was sneezing a lot. She was treated with penicillin and it would get better but never completely knocked it out. Finally after 4 weeks worth of azithromycin we finally got rid of it and she quite peeing nearly as much. Then I confined her in a pen at night and it took a week or so of constant supervision out of her cage and putting her in her litter box every time she peed in the wrong place and now she has near perfect litter habits.  (A benefit of the lock down that allowed me to do that.)
I also had another rabbit who quit using the litter box when he got sick, but no other symptoms. By the time we realized it, it was too late and I lost him. (Still makes me sick. He was the reason I fell in love with rabbits and my absolute favorite and I lost him way too soon.)
All this to say, that I would make sure you have a good rabbit savvy vet and ask your vet to double check his health and make sure there is not some underlying health issue that is causing his behavior. Especially with the aggressiveness. I only had 3 smaller sized rabbits, but I can’t imagine that being a normal behavior.