I am always annoyed by etherdelta's user interface. It is hard to use usually in mobile device and hard to scroll down especially when buying or selling. Unlike other trading sites have good UI. I can't stop using etherdelta because most of my tokens are only tradable in their slow site.
My first experience in crypto trading started with etherdelta. During that time, the exchange was fast and responsive. But after a series of upgrades of their site, the experience I felt when navigating their sites felt a bit sluggish and since then I have moved on to other exchanges which are responsive. Their site just eats too much resources that it only keeps on loading when using my phone.