Ace33 I can relate to what you are describing. It sounds like depression and anxiety to me. I am not a therapist by any stretch. I can say that depression keeps us feeling numb or sad. It's hard to be motivated and think or feel positive feelings. Anxiety makes us feel agitated like we need to fix or do something. When the two visit at the same time it's a tug of war that's exhausting.
Can you look back and figure out when the first time was that you started to feel this way? Was there something, some place or someone that transpired a the feelings of anger and hurt? Sometimes we dismiss things thinking it's not a big deal and little by little we start to get chipped away at until we find this mountain out of nowhere we don't have the energy to climb. It usually started with a small fleeting thought or feeling we didn't address, at the time.
It takes great bravery to look into the deeper place of pain and find a way out. Sometimes, if we're honest we don't want to face it. I would suggest seeking our a therapist's help. Depression is very heavy and sometimes we need someone to help us navigate and remind us of our self worth.
I'd suggest not making any big decisions with your life while in this state. Wait it out and see if you still want to get rid of your belongings once these feelings pass.
I can say you're not alone! You are worthy of a life worth living! I'm impressed by the effort you have gone to for finding something to enjoy. I can also relate to that sinking dark place when you know what you are doing should bring you joy but you're not happy, you're angry, the sun doesn't look bright no matter how beautiful it is or should be. This isn't your fault! And, it will eventually go when it's times is up hopefully used for the purpose to bring you to attention of the love you need and deserve inside for yourself. Big hugs!