I can partially understand where Krice is coming from. Once you've had the best, why settle for the rest? Ie. if a certain game in a series reaches a zenith of gameplay perfection (and gameplay is what you care most about), why would you ever play earlier/newer games or games from other series? [disclaimer: not how I feel]
While this might or might not be true - up for unrelated discussion - I don`t believe this is what Krice`s message is. Straight from the horse`s - sorry,
developer`s mouth:
The reasons I don't like ADOM are incomprehensible to you. I can understand it, because lot of the players and developers too are only regular people. The way I see games like Nethack and ADOM today is that they are extremely simple games. I can still play Nethack, because 5% of it is still playable in my mind. Most games are 0%, that's why I don't usually play games. It's similar to what I experienced with books. When I was younger I was reading a lot, but then I started to see patterns beyond normal understanding and it was no longer needed for me to read more.
So basically, our proto-brains are unable to comprehend the advanced patterns that would show us why Adom/Nethack/other majors are in fact basic bitches of roguelike world. What are the good ones, with more than "5%" gameplay? That`s left unsaid, perhaps they don`t exist yet and we`ll just have to sit and wait for Kaduria - the true next-gen RL - to arrive.
As AM pointed out above this is one of the oldest -and very dangerous - fallacies our poor brains sometimes steer us toward. The "I`ve seen the light while y`all are still groping in the dark" is cute but quite sad...very easy to fall for if you`ve been around for a bit, read this and that about pattern recognition and such and start fancying yourself a unique snowflake. I had a similar brief period of delusion a decade ago when I thought I read it all and what`s the point, luckily my in-built neutral defences are quite strong and I got over this BS...turned out I wasn`t just looking hard enough (there`s always some brilliant stuff out there, it just gets more difficult to find)
TL; DR; it`s not ADOM - it`s the player. Play one game for a decade or so and of course you will perhaps start getting bored of it a bit, see all its tricks and gambits and if you lack perspective and have propensity for delusion, as our Uncle K here, you might start thinking it sucked from the beginning.
And re: that "people on this forum hate roguelikes." adage - no, not at all. There`s nothing wrong with slaying some sacred cows, disliking some styles, genres and/or particular roguelikes and discussing it to hell and back, It`s just, as a wise man once said; " If you come at the King, you best not miss". Aka, bring your AAA arguments if you want to tell me why Crawl sucks. This is why I miss old regulars like Jo, mushroom patch, Vanguard & Co - could disagree a lot, but at least their delivery was thought out and compelling, not this weaksauce Molotovs Krice`s lobbing around.