I disagree that me and you should give up. We have learned more from our failures that most entrepreneurs would have learned for their short-lasting success. It's time to introspect, write down a list of todos that will make your product better, talk to a bunch of users and see why they are hating your product and get back to coding.
You are just in mid-30s and you are going to live for atleast 50 more years. Hang in there for a decade.