No, it's not small, but it's afaik the smallest model you can find that's still unlockable and runs any ungoogled OS

> I'll be forced to go back to dumbphones in the future... along with many others, I guess.

Going back to a dumbphone for me would mean changing my outdoor hobbies (like contributing to openstreetmap), so I'll take my losses and continue on a smartphone, but I share the sentiment. Power to you if you do it!