DrunkonDuty
he/him
>>>>Is it my fault?<<<
Not completely. Communication is a two way street. You were communicating but the players weren't picking up on your signals. You didn't realise (or else didn't want to go all meta-gamey?) that they weren't. Ah well, mis-communications happen all the time. They're no-one's fault. (I wouldn't want to go all meta-game myself, it takes away MY fun to have to sit down and explain what the hell is happening. Like having to explain a joke.)
As an aside: I think your players were wusses for refusing to play. I mean,




, what's the worst that'll happen if you keep playing? Your fictional characters all die. What happens if you refuse to play? Your fictional characters cease to be used. Net result: the same.
So they got their arses handed to them by a bad guy. That's what happens sometimes. A game where the PCs win every encounter because they're supposed to would be bloody tedious if you ask me. That's why I think the OP's scenario would be a fun one to play (or GM.) Without knowing the actual context allow me to put forward a context in which it would be quite reasonable:
The heroes are seeking a way into the impregnable Drow Fortress that has resisted attack for a thousand years. When it turns out the Impreganable Fortress is actually pretty tough no-one should be surprised. After all an Impreganable Fortress that was only Impregnable to characters of 5th level or down but perfectly Pregnable to 6th level characters (which is the implication of strict CR encounters) just strikes me as, um, <insert expletive here>.
Not completely. Communication is a two way street. You were communicating but the players weren't picking up on your signals. You didn't realise (or else didn't want to go all meta-gamey?) that they weren't. Ah well, mis-communications happen all the time. They're no-one's fault. (I wouldn't want to go all meta-game myself, it takes away MY fun to have to sit down and explain what the hell is happening. Like having to explain a joke.)
As an aside: I think your players were wusses for refusing to play. I mean,






So they got their arses handed to them by a bad guy. That's what happens sometimes. A game where the PCs win every encounter because they're supposed to would be bloody tedious if you ask me. That's why I think the OP's scenario would be a fun one to play (or GM.) Without knowing the actual context allow me to put forward a context in which it would be quite reasonable:
The heroes are seeking a way into the impregnable Drow Fortress that has resisted attack for a thousand years. When it turns out the Impreganable Fortress is actually pretty tough no-one should be surprised. After all an Impreganable Fortress that was only Impregnable to characters of 5th level or down but perfectly Pregnable to 6th level characters (which is the implication of strict CR encounters) just strikes me as, um, <insert expletive here>.