Okay, so im just posting to ask for thoguhts on my zerker. My main questions are: Have I failed this account, and if so, what can i turn it into?

The main questino is did you quest All of your defence? if so your goin good. Just do the right quests.

I made this pure about a year ago, and i DID get 4k defense exp without quests. Weather or not that makes a difference i do not know.

If you can do fremmy trials, nature spirit, heroes its not ruined.

I plan on doing nature spirit and maybe starting fremmy trials today. Think it possible?

If you only did 4k defense exp without quests, no more, you should be good. At worst you end up with 46 defense which SHOULDN'T level you.