Why is it so hard for me to end things?

I don’t know if it’s common, but have a feeling it may. The idea of finishing something gives me so much anxiety. I can’t physically bring myself to do it. From scanning 1k documents except for the last one. Always leaving the last bite. I’m not sure what it is or from what emotion I’m running here.

If anyone also struggles with this and has done some fruitful introspection please share.

I’ve been trying to crack it because it’s just horrible and affects every aspect of my life. Feels like it’s robbing me of a joy of completing a hard task.

Also when I see those videos where a person puts the last puzzle piece in and everyone in the comments raves how satisfying it must feel. And for me that’s the most dreadful part.