I have a bin full of pristine keyboards that never see the light of day because of Fn, arrows, Home, and/or End placement.
I used to work on 3 different laptops, so I kind of got used to thinking about every stroke using those keys, but I never want to go back there, it's so mentally taxing.
I find the "wrong" FN keyboards annoying like OP, but the Home/End to Pgup/Dn grouping of keys is what really makes or breaks a great keyboard layout for me.