Better tools are needed and I waste so much time fiddling with Flexbox settings. If an amazong tool was available for tweaking Flexbox I would happily pay for it.
I agree with your sentiment, but curious to see what you ran into specifically.
A bit like this but going alot further http://the-echoplex.net/flexyboxes
I'd pay $50 as a once off for a really useful utility. It would be even more awesome if it came with a pre built set of UI widgets that I could drag and drop on and build up an interface, like Balsamiq. Once you have something like that then you're getting something really useful.
And then if you were super clever somehow you would have made a user interface builder that you could then directly hook somehow into the react component lifecycle and the world would be an amazing place.
Your skills would need to be at "wizard" level to make all this happen. Are you a wizard?
If you have the skills to do this programming then this is an idea for a real business, as opposed to all these startups doing the next "uber for food delivery".