Side note: Why all the bash and hate for Postman here? Why not write an article and express your concern(s) there and submit it here in HN. Or better yet, connect with the team at Postman and throw your ideas on making it better.
However this looks as a duplicate to official api network https://www.getpostman.com/api-network/ to me (as mentioned below). On the other hand, I like that you can share your collections, rate them and have a discussion. But what if Postman team decides for the same? :-)
I was using Insomnia quite happily until it became really resource hungry and CPU started to spike because of it. May be I should give it another try.