In practice, FPTP is not actually user-friendly either. Unless you’re lucky enough that you genuinely do just want to vote for whichever of the two big candidates you’re presented with, you either vote tactically (a decision nobody enjoys taking) or you accept an extremely high likelihood of your vote being effectively wasted. Even if the actual process of putting a mark next to one candidate is simple, the decision process leading up to that is significantly complicated beyond the necessary “work out who you like”