ok but for real the guy who said u should see a therapist is 100% right, but not in a negative way at all
i thought it was stupid when i was younger but it has helped me a ton over the years and i strongly believe that everyone would benefit from seeing a therapist, it's a shame it has such a negative stigma even today
and its much easier said than done but the best solution to not being motivated to finish a project is to simply sit down and make yourself work on it some more
im doing a computer science masters despite not having an undergrad in cs and ive had so many projects/assignments that ive been stuck on or unmotivated to work on, and ive told myself so many times like 'oh i dont have the coding background for this' or whatever story, but at the end of the day every time i actually make myself sit down and start coding or working on it (rather than thinking about it or rationalizing my inaction on it) i find it's not nearly as hard as i thought, its just the first step of getting started that is the hardest (which you have clearly already done on this project and many others, just need to re engage with them)
everyone has their setbacks and things may not be 'fair', but the only thing you can do going forward is accept things as they are and work with what you have, you will never be successful if you hide behind excuses to not try something
by all means maybe this isn't the project you truly want to pursue, but that line of thinking and attitude will prevent you from accomplishing pretty much any goals you have in life and i hope you are able to move past it (or at the very least not post on the forums about it lol, im posting this to be nice and hopefully help u go down a better path but if u keep posting this type of stuff in the future i will not care enough to spell it out like this)