iPhone does have its limitations.
As a Samsung fan who also loves the iPhone, I’d recommend buying the original Apple charger for battery life. While the Samsung 45W charger will only give 20W to the iPhone, it might still be worth having the Apple one for battery longevity.
And I agree, apps seem to run smoother on the iPhone, and Face ID is great. But the interface bugs have surprised me too.
The iOS 18 bugs should hopefully be fixed with updates. I’ve noticed a few glitches myself but got them after a fresh install, so I think they’ll be gone with the next updates.