Depends on its setup I guess. I refused to touch the boss rush in Skyward Sword but I hated most of the bosses in that game, so...
I don't play many games where I have dealt with proper gauntlets, I don't think. It's not something I'm used to experiencing outside of a select couple games. I Am Setsuna had one in the form of the final boss, and I was reluctant to do it because it looked intimidating but I got it first try by just not rushing the offensive too much. But it took me probably 40 minutes to slodge through all five "bosses". Speaking of end-bosses as gauntlets, I didn't mind the boss gauntlet in Smash Ultimate, but I wish there was a designated mode for it instead of locking it behind World of Light. Brawl had more fun bosses imo and it's boss battles mode was probably more enjoyable--not to mention more accessible.
As far as Hollow Knight's most intensive gauntlets go, as Az mentioned... the Trial of the Fool is harder than the unbound Pantheon of Hallownest. There, I said it. Though I guess they both have a difficulty spike where they remove the floor for awhile. In the trial, you fight aspids and petras and winged fools while being forced to have no place to land and have to base all your attacks while on the walls. Absolutely no healing allowed until the floor comes back. And goddamn floorless Markoth in the pantheon (which is leagues harder than the endboss). But you can still heal for him if you land (there's still five small platforms strewn about in an "X" formation). Both of these floorless sections occur like ~90% through these gauntlets respectively--so if you die, you have a lot of ground to make back up when you try again. But the pantheon allows you to heal between each boss (and Watcher Knights generously have a longer healing period after the fight ends, it's almost as if Team Cherry knew they're a butt of a bossfight to give you extra time to recover for Uumuu who comes next), and you get checkpoints where you can fully refill your health and soul while the trial lacks this. You get more focus being one on one with a boss in the pantheon while you're being constantly assaulted with a barrage on enemies in the trial.
The thing is with gauntlets is that they don't always seem to test skill so much as they test your endurance. Or patience, depending on what exactly is happening. With the example of Hollow Knight, the trial definitely tests skill more aggressively than the Pantheon of Hallownest does, at least a more practical skill of managing multiple enemies at once, which I am not good at. If gauntlets make it into the base game and are required to progress to the end, I'd rather them be more simple in format with very few waves. But if they're like optional for a good upgrade or just a side challenge, then I don't mind them being a bit more extravagant so you can feel like you overcame it and the prize being that much more rewarding. I'm not good at games, so dying doesn't really phase me apart from just like being a grim reminder™ that I suck. Makes me driven to work that much harder to git gud if I like the game enough, though.
