Developers who became customer support (or vice versa) - what problems did you discover that need solving? [i will not promote]

I'm researching pain points where developers and end-users disconnect.
If you've ever:

- Been a developer who did customer support shifts

- Worked in support and seen the same problems repeatedly

- Built something after directly interacting with users

- Found a problem that made you think "I could build a better solution"

I'd love to hear:

  1. What specific problems did you discover that weren't being addressed?
  2. What tools/processes are frustratingly bad but people just accept?
  3. Which industries have the biggest gaps between what's built vs. what's needed?

Working on a new project and want to solve real problems, not just build another tool nobody asked for. Any insights appreciated! i will not promote