I agree relatively, I think the Nest boss is perfectly doable solo. I think Fungal Cavern is hard, and is doable solo, but is simply not done because it has bad intuitive learning since it just expects to shotgun you for you to learn the mechanics. Like the spider can pop an 8/8 instantly and is the fastest minion in the dungeon and can enter the dash from out of your vision range. People have defended that, somehow. However, I like challenge, but the sincere problem with the game is that most the endgame content is attempting to rely on cheese, or pure bad design to kill you. Which makes me sick and want to quit. I could honestly care less if my death was something blatantly my fault even if my character was my 8/8 I worked so hard on and that I’d have to grind all that back again.
Lost Halls in particular is just horrible because enemies have far too much health, and there’s far too many rooms to clear to reach the boss, and the damage is poorly tuned, such that every innocuous enemy in the dungeon will deal >100 damage simply because designing interesting rooms was too hard. There is not a single room in the Lost Halls that I would call interesitng or fun to clear. Lost Halls is cohesively bad because it’s anti-challenge, it gates off almost every player from a serious clear and incentivises them to go in enormous parties that (still) effortlessly clear the dungeon, rewarding them loot better than anywhere else in the game for the ‘challenge’ they fought. It’s not what someone should be doing when they enter ‘the hardest dungeon’ because it’s clearly not.
If I were to be a rogue player, and just play the game how I want to play it, where I have small group Nests in realm whenever I’m lucky enough for it, and solo Fungal Caverns. I can do that, but there’s some oozing zombie ‘veteran player’ with great understanding of the game who is mindlessly grinding his hours pressing space on a priest in a LH discord run to get triple my reward. Not that I ‘care’ or will change how I play, but it is very stupid and the dungeon is a toxin on the game that seeps the worst out of players.