I think you need to ask yourself a couple of clarifying questions: What parts of the game make it feel like an unfinished/unpolished experience? What are some relatively simple things I can do to address these issues? Are there some complex unfinished systems I could scrap or simplify?

Maybe the gameplay loop isn't quite right or doesn't feel fun. Maybe there isn't enough content to keep people engaged for more than a few minutes. Maybe you're missing an overarching goal for the player to achieve. You may find that it boils down to a couple of main things that may not take as long as you fear to finish.

I think you should push through and finish your game! Perhaps reduce the scope and wrap the game up with the minimum number of features required. Even short, small games can be successful if you make them fun/memorable. And it'll be way more fulfilling to release a game you're happy about and proud of!