Get a Sonim XP3+
It's an android (11) flip phone but without Google store and without touchscreen, so almost nothing works on it
There's no setup, besides disabling the PTT button and making it open the application of your choice (as long as your choice is Clock, Voice Memo, or Music/FM Radio)
The ability to slam the phone shut to hang up, and call via speed dial without opening the "phone" app more than makes up for the lack of Instagram.
If you want a chatbot put 1800CHATGPT on your speed dial
Seems like it will cause me to get stuck at an airport or train station while an employee tells me about the virtues of an app.