My favourite dead-end task is when I'm working on some established non-mobile first UI that has often been haphazardly put together with only 13" laptops in min

My favourite dead-end task is when I'm working on some established non-mobile first UI that has often been haphazardly put together with only 13" laptops in mind, and asked to essentially "make it responsive". It's a tiresome conversation to have when the task bleeds into another sprint, usually with a surprised manager who I'm sure could have finished in 1 hour between meetings. Don't forget the tests, QA, managing other PR reviews, participating in pointless meetings, and inane last-minute requirements changes