You don't really have that choice. Many social apps (Facebook, Instagram, Twitter) aren't possible to uninstall unless you use a custom ROM. You can only "disable" the apps.
It's still perfectly possible to just not open them/log in, obviously.
It's still perfectly possible to just not open them/log in, obviously.
Typically, "uninstallable" apps can be disabled via adb commands if you don't want to (or can't) flash a custom ROM. Sometimes they can't however - for example, Amazon sells subsidized phones that display advertisements on the lock screen.
This isn't a problem if you have a rooted device, but root is difficult/impossible to obtain on certain devices (like Samsung's Galaxy 8 onward) due to enterprise level tamper-proofing.
Having said all that, I just got an unlocked Pixel 4 and it has zero of that bloat. If you happen to consider the Google services themselves bloat/tracking (they often are), rooting is fully supported which allows you to install an Android distribution without any Google services.