I keep building projects nobody wants. So this time I'm doing it backwards

So validating your idea before building is better, but there is an even more "backwards" way:

You're still assuming people will be interested in one of your ideas. There is far from 100% chance of that.

To increase this chance closer to 100%: ask people what they are interested in. "Extract" the #1 problem shared by at least 10 people/businesses (that would be worth paying at least $50/month to fix). Then offer a solution to this problem.

> There are three types of problems: 1. hair-on-fire problem, 2. 2nd biggest problem, 3. everything else

Or, you could take the time to do some market and user research to validate your ideas. Why people would do the work of coming on your page and provide their feedback for free? You could also do some discovery research to find problems that are worth solving and then come up with ideas. Happy to chat further on research methods.