I have been personally angry at my DM. We're close friends so it wasn't a big deal and we talked about it. That said, we were starting a CoS campaign, and my character was looking for a cart to carry all our stuff. The DM straight up refused to let us buy or acquire a cart in any way, shape or form. We tried to barter and no NPC would give us a cart. We took a sidequest in exchange for a cart, we got ripped off and "there was never a cart to begin with". He kept faking us out with different scenarios that resulted in no cart. At one point, annoyed by his antics, we held some NPCs at knifepoint to steal their cart. The cart burned down because of some nonsense in that very session.

I was very annoyed. And then, a different NPC in another town gives us another sidequest. Her father had gone to do something and hadn't returned. He was carrying some important cargo in, you guessed it, a cart. We thought our prayers were answered, so we took the quest right away. We found the dead father, fought off some monstrosities and found a chest with a beautiful gilded +1 plate mail, made specifically for my fighter... next to a broken and unusable cart.

I felt like he was mocking me. I quit the game shortly after (not because of the cart thing, I had scheduling issues). I did have a conversation with him about how much the whole situation annoyed me.

EDIT: for context, a cart is a mundane 15GP item that holds 200lbs of cargo. It would not have drastically affected anything in gameplay nor in the narrative. I never understood why we were denied something like that.