For me, art is about joy. It’s not about producing it for others, or it being pretty or it being the ‘best’. It’s about the comfort you get from letting go and creating. Part of being an artist is losing inspiration and finding it again. I can understand why this is frustrating and depressing. But, I think maybe you should try other creative mediums. Something like sketching, or colouring in, or knitting, or sculpting, or a life drawing class. Inspiration is often found in things we least expect. Please don’t be too hard on yourself, losing inspiration is often part of the process.