Firestick 4K Max Can't stream large files

I’ve used many over the years - CinemaHD was my favorite for a while - but most eventually disappointed in some way or just stopped working or were killed off and resurrected as a new version months or years later. I got tired of having to find a new one or upgrading every few months and having to configure everything again. Stremio seemed to be the most stable and reliable. I’ve tried Kodi and absolutely hate it.