Content too easy? - They must be catering to casuals.
Content too hard? - Why is only 1% of the community allowed to see the content? Stop catering to the hardcore!
Finish content too fast? - Not enough content, you made it a joke!
Content takes too long to complete? - I don't have all my life to waste on raiding!
Everyone has different tastes, not everyone can be pleased.
It is 'literally' impossible for them to try and do so.
So they have to decide, which % of the playerbase do we wish to appeal to the most?
You apparently were not in the % they chose.
Sorry about your luck.