Minor Rant - General Combat / Damage

[Seraphor]

Because this is a team game. You are playing in a party, and in all the content that "matters" (savage and ultimate) you're in a full party with 7 other people. Everyone has their buffs, their +5% damage skills, etc. and they all stack upon each other and snowball pretty quickly. If everyone could inflate their numbers by 10%, 20%, 30% etc. balance would be non-existent, bursting would be insane damage and fights would be over in seconds.
CC is very contextual and can be really unbalanced in higher level content. A stun is effectively damage mitigation, so a 3 second stun means no damage for 3 seconds, and damage in content that "matters" is very, very scripted.

You just need to get used to different numbers. Drop a zero. It doesn't need to be 30%, a 5% damage buff is massive.