Nothing frustrates me more than not being able to pause for no seemingly good reason. I'm playing Wild Hearts right now and even though I never play online I cannot pause for some reason. To simulate pausing, I can turn off the xbox and the quick resume feature makes it look like the game was paused when I turn the console back on.
Other games guilty of this are Fromsoft games: Dark Souls, Elden Ring and so on.
Obviously all of these games have an online component. Not allowing pausing when this component is activated makes sense. But if I am playing completely online why cannot I pause? In Soulslike the worst exploit I can think of is switching equipment on the fly but is that really that bad? When stuff comes up in the middle crucial moments it frustrates me a lot.
More often than not is a design choice. Dark Souls does it to increase tension: you can't pause to consider your options, you have to do it, and do it fast. It gives an even greater importance to your quick item slots since rummaging through your inventory for an item, while possible, can be cumbersome and kill you.