I would say slow load times are a more instant turn off from a site/app. However, if I can't figure out how to navigate a site, I will not be using it for long.
Confusing navigations for sure... I have dealt with load times slow before on deployments - you kinda get used to it. But an app/site that doesn't do cross-page-linking well is miserable to use lol.
Slow load times. If the product doesn't load, a user won't even experience the navigation, poor or otherwise, because they'll drop off. I certainly would.
I'd have to say confusing navigation. That would hinder my way of working, as I'd have to constantly look for the way I need to go to as the next step. It gets irritating at some point.
Slow navigation can make the experience bad but I reckon bad navigation or unexpected behaviour for a particular flow in the app makes the experience jarring and leaves a sour taste in the mouth.
ArtHeart.ai