What Has Been Your Biggest Challenge When Setting Up Emulators?

[yuzu456]

I've noticed that many users can install an emulator successfully, but often run into issues afterward such as game compatibility, controller configuration, shader compilation stutter, performance drops, or graphics glitches.

For me, getting the right balance between performance and visual quality has usually been the biggest challenge, especially when testing different hardware setups.

What has been the most frustrating issue you've encountered while setting up or using an emulator, and how did you solve it?

I'm interested in hearing experiences from both new and experienced users since different systems seem to have completely different challenges.