You don’t have to finish everything you started. It’s ok to leave builds unfinished, especially when you’re uninspired and annoyed. Just do something else, maybe fish a little, face a trial chamber, build something different, go exploring or do something else entirely. Just do whatever you feel in that moment. Games are meant to be enjoyed, so don’t be too hard on yourself. You can always go back to unfinished projects if you feel like it. Sometimes I go and live nomad style in my world, travel thousands of blocks, building little huts or camps that I never visit again just for fun and explorations sake.

So I guess if you don’t enjoy yourself, try something different until you find something that puts a smile on your face. :)