Urgot's ult feels extremely unsatisfying to use when damn near everything counters it.
What is Urgot's Niche? A inescapable execute. Yet here are a list of the champions / items that will negate it completely.

See what I mean? When his ult is supposed to spell guaranteed death for his enemies when they fall below 25% health, it shouldn't really be able to be just stopped because you're playing Olaf. When Urgot's ult has it's own special animation on a pulled target's screen, it should be DEATH no matter what. If you fell low enough to get pulled that's your problem.