Do it. Several reasons:
First: so far I've found the community on here quite polite and encouraging so far. So my guess is the worst that will happen in the comments are encouragement and ideas for improvement.
Second: You'll learn that it's hard to judge something you've been working at and looking in such an intensive way without stepping away for a while. If I look at my game now, all I see is the long list of features and ideas I abandoned for the jam version and the bugs and problems I didn't fix. Nobody else knows that list so nobody else will look at it that way. Same as nobody else will play it while looking out for the small glitches I think I noticed once during testing but could never reproduce. The same will he true for your game. You'll have spent a lot of time thinking about it, running through it, picking apart your ideas. Nobody else who plays it during this jam will look at it the same way.
Third: No matter if you still think it's boring or not after stepping away for a week, submission for the jam will be over. If you submit it now you'll have finished the jam, gotten some feedback that's probably more positive and maybe gained some momentum for the next one.
I started learning programming around 15 years old, not games. All the stuff I did was pretty awful by my standards today but I learned a lot and the most important thing for learning was the feedback other people gave.