I think the problem is some fight that has more than 2 or 3 phases, like Titan, Turn 4 and 5 of the first Coils.

casual players and first timers may learned about the fights after 2-3 wipes and be able to clear it eventually. and experienced players can explain them about the mechanics. but if it's a fight that has more than 3 phases, it almost impossible to explain everything and defeat it in 3-4 attempts. telling casuals to go watch a video on youtube is not gonna help because they're casuals. why do they have to do research just to play games? they'll just give up.