I have been doing dnd for a good bit now, but I feel that I am just as rusty as I used to be when it comes to making my friends happy with my decisions as a DM. I want to be on their side, but I constantly feel that making bosses that are unique often make them really angry due to how hard it is to fight them or learn their pattern. For example, I had a boss that stole all of the monsters that my friend had, except the one he had out. This caused him to be salty during the entire fight. I realized later that it was how I worded it, but he still needed time to vent out the anger. How do I avoid such troubles and keep my friends happy? (besides the obvious and changing how I word things)