Do you get annoyed that people stand in front of you to get food at a buffet take so long to move out of the way ?

With restrictions being loosened here, I know some restaurant buffets that are reopen including coffee shops. Nothing annoys me more than when someone takes their good old time and keep people waiting behind them at a buffet to get food or condiments, and at a coffee shop to get sugar or napkins. At a buffet, I will wait for like 2 minutes just for someone to move out of the way and they will be standing in front of me being in my way not moving out of my way when I am waiting to get food that they are standing in front of that is hard for me to reach over. I will sometimes say: "excuse me" and they will either tell me to hang on one second or give me a weird look with not moving. Even at a coffee shop I will try to wait for someone to move so I have room to get napkins and the person will take their good old time not giving me room to get through and get something. Is this rude of them and do you find this annoying? What will you do?