The rest of the world doesn't drive F-series trucks.

I'm thinking of getting a Ford EV as my next car, prefer the features and looks to the equivalent Stellantis models.

The US does though. The f series is a very practical vehicle for a lot of people since it can do so much. It is a compromise but the negatives are not that great.

IIRC the F-150 is the most popular vehicle by sales in the US.

That is true, but only because Chevy Silverado and GMC Sierra are counted separately despite being badge engineered twins.