I mean... I don't want to be a jerk here, and I only say this because it might honestly help you understand where these people are coming from.

i108 doesn't mean you have skill. You could very well not be doing your best DPS with some easy fixes and they may be just trying to help you. i108 means you ground 4-man dungeons, FATEs, maps, hunts, etc. None of those require anything other than the bare minimum of skill.

I'm really not trying to be mean, but the people giving you tips on how you play might just be trying to help you. And yes I looked at your gear on lodestone and saw that you do not have any coil gear, which was the basis for that response.