The game is not too difficult but too much focused on firearms at the moment.This is not a big surprise since Madmole seems to me to be the type of player who can't do without firearms. No matter which build he tested, in the Horde Night he always resorted to firearms. And how he set the traps clearly showed that he had no experience with traps at all.
I only play at Standard and that's only one level above the simplest level. I don't have any problems with ferals or radioactive zombies, nor do I have any problems with zombies in general. Only the demolisher gives me a headache. But I will find a way to kill him reliably without the danger that the explosion will be triggered.
I can outsmart the AI at any time. That is not the problem. I also found a glitch in the AI during my tests that caused this: