Crap, clunky interface is ingrained in their culture. There was a release mid last year that changed the comments loading to be paginated to speed up ticket page load times.
They loaded the oldest comments first...
and you had to click "Load the next 10" REPEATEDLY until you got to the newest comments.
I have since left that company and don't have to deal with Jira anymore so I'm not sure if it got "fixed" at all since then.
It was the one of the most baffling, user hostile decision I have seen made to a product, and I'm sure someone got a commendation for "speeding up the ticket load page by X%".