What do you mean the UI is bad? Which one? https://www.openpgp.org/software/

Sounds to me like you used a specific piece of PGP software you didn't like or understand.

How can you folks care so much about your privacy, but absolutely refuse to understand the tools you are provided that ensure your privacy? You're never going to get it if you demand it be provided in a blackbox app you don't have to think about.

ProtonMail uses the PGP standard. Its UI is simple and easy. There's still one issue: You're trusting someone else to do your encryption for you.