Why my damage feels so low

Hi,

I am a new player and currently I am following Fubgun's kb guide and my damage feels very low and I dont understand where am I going wrong.

Thanks for your help and suggestions.

Here is the link to my pob.

https://pobb.in/rfQncBi7dGip

I have updated my build now :

https://pobb.in/d6jJjKy9gem2

What kind of farms can I run smoothly with my current build.

Thanks.