Bad example: Street Fighter (and pretty much every other fighting game)
I know I'm going to get a lot of shit for this but just listen. Most games have a simple easy/medium/hard difficulty setting in them. Most fighting games however, have a 10 point system to adjusting difficulty and they all have some fundamental flaws. 1) Normal mode is always a different number on different games. Some games it's 3/10 while others it's 5/10 there is no set standard of difficulty for this kind of scale and it get incredibly frustrating. 2) It never scales linearly. 3/10 will be too easy while 4/10 will have your opponent use reversals/counters. That kind of difficulty spike should be gradually climbing instead of a huge spike like that.
These are just 2 examples for making difficulty more accessible. Games should make the player work for his/her victories and not just fire a few cheap tricks and call it challenge. Players should have to step their game up gradually and slowly implement all the new skills they've acquired. holding their hand while letting go at the edge of a cliff is NOT a good game design philosophy and these few example will hopefully influence they way we see difficulty in the future.
LOOK WHO CAME: