Has he been neutered? If not then it may well be hormonal changes. Rabbits also don't like change so he might just be letting you know that he doesn't approve of you getting rid of things!
Rabbits really should be bonded with another neutered bunny, they are sociable animals and are much happier in pairs as it allows for companionship, mutual grooming etc but I do understand that means the costs of everything doubles, if you do go for it then many rescues will do the bonding for you as it can be a stressful process which can take several weeks ( not always, some fall in love straight away!) but a rescue will be able to match your bunny with a suitable partner.
As for destruction try giving some natural chews such as hawthorn or apple branches, unsprayed obviously, stuff toilet rolls or brown paper bags with hay and forage, buy a treat dispenser designed to make them work for their nuggets so it takes longer to eat them and provides mental stimulation at the same time, they do love to dig so a box of soil or kids playsand is great but messy so maybe use outside or on a floor that can be swept, a cleaner option is shredded paper but long cut only as short cut is too dusty.
Supervised play only: make a little line out of string, hang it up and peg his greens on it so he has to work for them by stretching up a little.
They love tunnels and hidey places that have more than one entrance/exit and things they can jump on and off at different levels, Google Hop Inn rabbit hideaway, not cheap but will last, also if they still sell them IKEA dolls beds are hugely popular with bunnies!
Hope this helps