So videogame difficulty
Hard should not just mean "easier to be killed, harder to kill". Personally I think it should be that certain enemies use better AI, more advanced tactics, actively respond to things you do (such as buff & debuffs) and have expanded move sets.
It makes the harder difficulty actually more difficult rather than time consuming.
HOWEVER
I know some people prefer it as it is, so I propose a solution.
Normal: Standard gameplay. No easy mode (will explain more)
Hard: Suggestions above
Arcade: Just like an old arcade game that pads out it's length by being artificially difficult, enemies have more HP and hit harder. Also you get less stuff. Type of shit you expect from dark souls or OG arcade cabinets
IN ADDITION
I think accessibility options should be in every game. Color blind modes, modes to display sound triggers on screen in some way for hearing impaired people, longer timing windows including I-frames, etc.
Some of these would genuinely make the game easier for people, especially if you can do more than toggle on and off (say a % increase or even decrease for higher difficulty for I-frames)