| Sounds like a style conflict. A classy player, when recognizing a style conflict, will politely thank the DM, but explain that they really aren't getting what they want out of the game. Maybe there's a round of compromise in both directions, where both parties make an attempt to come to common ground and still have fun.
Sounds to me like you don't have classy players. I'd tell them that you're not enjoying the game, and it's obvious they're not enjoying the game, so you think it would be best if they just didn't play any more. If that's impossible, put the game on hiatus for a couple of months and when you restart, reschedule it to a time you know that one or both of them won't be able to come. Chances are they won't put up much of a fuss if they don't like the game to start with.
If they are friends, don't do the "tell them it's ending but don't really". They always find out.
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