init_5

This in fact sounds quite exaggerated. I've had nothing like this experience with the Pixel 4a. Battery life has been exceptional, UI works fine, Play Services work with about 90% of the apps I tried. Google Camera worked also with Play Services so you don't have to use Open Camera.

Welcome to the GrapheneOS family. I highly think you should consider sticking with GOS, as the security model is much improved over devices such as the Librem 5.