Possible hacking


I encountered a cabot player who seemed to have unlimited jetpack, but more importantly, was firing his railgun incredibly fast. He downed my level 1 kraken from full health and 1 bar of armor to nothing in less than 10 seconds. This happened on PC. Are these known bugs, or was i right to assume i encountered a hacker?
Has anyone else encountered issues like this?

TLDR: i ran into a hovering, infinite jetpack and automatic firing railgun Cabot.