Honestly if this was under any other game forum I'd think you're trolling lol. It only makes sense that the game gets harder because this is a game... and you're lvl 100 now instead of lvl 90. Imagine if you played a game that never got past tutorial difficulty, would that be fun?

Anyway, if the fight is difficult, practise will help; if you don't want to play the content, then don't play the content.

Also addressing the "we don't do this content alone" paragraph: you said it's not an issue of learning the fight, because you can do that. Why is it that other people don't get a chance to learn the fight and die/wipe the way you were allowed to? Make it make sense.