It's mostly just the frustration of constantly running into the hellhounds, it feels like it is impossible to avoid them for more than a few steps, either running into them or a trap that summons them or stuns you until they get to you. I'll try just running every time, there are skills and items that help with that, right?
If you're struggling to avoid the hellhounds, maybe try practicing? Their patterns are deliberately imperfect so you can reasonably avoid them, at least for a time. Getting into a fight with them is something that's supposed to happen when you're backed into a corner (or if you deliberately want to have combat sexy time); it's not supposed to occur repeatedly.
At its core, the Labyrinth is a pretty simple Pacman deal, so I'd say performing well on that front should be your priority.
If you need to run, as mentioned by Justalittlesexy, Restraining or Stunning your opponent will guarantee you can run away. Some Equipment and Perks will also buff your chance to run away, which can help make things simpler in case you get caught in a battle.
Hope that helps!
Semi-related. Went to the mods page to check out what was available and saw you're one of the authors of the Mari mod. Bro is there any chance of her coming back or being subsumed into the vanilla game? She is so, so good. Legit my favorite character in the game.
I indeed contributed to the mod, albeit as an editor (doing copy editing and giving feedback and input to epickark) rather than an author.
Whether she'll get more content is up to epickark, so I can't speak for him. I'll make sure to let him know of the praise, though!
And as for whether Mari will become vanilla content, that's up to Threshold, but I don't believe there's plans to that effect.
Thank you very much for the positive feedback. It's a very nice mod indeed, and Mari is very charming and sexy, especially if you're into the fetishes she caters to.