FortNite Season 6, why didn’t this kill the enemy?

The long anticipated season 6 is here and as a player, I’ve only played since the end of season 5 so I wasn’t sure what to expect.
The good news is there are all kinds of new features, game mods, gear and skins as we’ll get into in another article, but today my question is how does this rocket launcher shot while jumping down at the enemy not take them out?

While on top of the mountain, I hit a couple of shots with an SMG, then jumped down and shot a rocket.  I’m almost ready to celebrate when they guy keeps firing.
He jumps, I jump, launch another rocket…. whoops! I missed, luckily he does to, but as you can see in the next image, he’s on target with the 3rd shot!  INCOMING!

Wow, nice skin… oh no, bullets…..

We all know what happens next, I’m toast!

Why didn’t I kill that guy?
This game can be fun, but also very frustrating…..