I am more interested to find platforms where laymen share their pains about items they use.

Isn't that basically https://stackoverflow.com/ and/or https://serverfault.com/ ?

Isn’t that just a blog or podcast or even a YouTube channel. You might think I’m being funny, but this is the core purpose of the web—low friction/barriers to put your personal content on www. The low barrier platforms are YouTube and any of the social media apps when a *blogger use these to promote their content hosted anywhere they choose (for all the various reasons someone choose how they want to produce content)

Same, but I’m also scared of us nerds joining and telling them to just self compile/host/deploy/whatever

I am solving this by buidling https://huntlie.com

Users can give feedback for their product which can be used by others to decide which product in the same niche they want before trying every product and then finding out.

I am also trying to figure out ratings (Usability, Support, Value for money) for each product.

If you're looking for casual ideas what persons have ideas on then have a scroll through halfbakery.com they are inspired by problems that people foresaw.

There are several tools out there that scan Reddit for people complaining about problems. Just search for them.

isn't this basically Twitter, FB and even Linkedin (laymen complaining about how they can't find jobs or get ghosted), as well as community/help forums for specific products? Of course, there's no central forum for sharing pains, but people tend to complain in the platform where they're most likely to get a response...

This can be extended to include what you’re talking about. Do you have a list in mind?

It's called UX Research.

Agreed! And, i would call such a site/portal/etc., something like "Awesome Pain"...I guess it could serve as a repo of anything from:

* startup ideas...

* to gotchas for devs to think about fixing for their respective apps/services...

* to a study in best practices, or maybe what not todos...

...etc. ;-)