I'm sorry you feel this way. I too have no kids, so I scrapbook my dog. I have scrapbooks of my past dogs and they bring me happiness to look through them and remember how I loved them.
I don't get to travel much, so don't have a lot of pictures, I have a very small family and we seldom do anything together that we snap pics of.
But I love scrapbooking, making cards, art journals, mixed media projects, gift albums for friends, etc. For me it isn't about leaving a legacy but about tapping into my inner artist and as stress relief.
I hope you take a moment to reflect your reasons for even starting this hobby before you get rid of everything. You may find that you're simply in a bad place right now but that could change and you might miss this outlet.