Startup to find ideas for startups

I thought I was thinking about what to do in the field of software, so that all the money to make was a really useful service or program, and that’s what I thought up. To search for a startup idea, you need to make a website :)
Which one
I think many of you thought about the theme of the program / site / service that you could write and earn / benefit people. So, it would be great if people themselves once said what they need. For example, one of the greats of our time said (not a quote) - if you want to earn money, take something that people simply hate to do and sell it as a service.

So, we need to make a website where people can:
- constructively discuss the shortcomings of existing solutions in the field, for example, software;
- give practical advice on the same topic;
- rank yourself (well, you understand - the best answer, the hottest problem, etc. and etc.).

And it is useful to people, and startups to help. What do you think? Or is there already something similar, but I overslept?