There are maps that can be somewhat more difficult due to situations like described in the post that you found, but there are multiple locations for each boss, so another solution could have been to find an alternate location. That adds a little bit of difficulty, but not much.

I suggest making the game more challenging by turning off portals and turning off the map. Both of those significantly increase the challenges, and (IMO), make it a more enjoyable game.

The downside of both of those is that it's going to take longer to "complete the game" if that is your goal, but if you are looking for something that is slower paced, and will likely get you into more difficult and challenging situations, I think it's a good fit.