Need sugession for Reapplying B2 Visa

[Pankti Shah]

I got rejected for B2 visa with spouse on 2014 and with kids on 23 april 2018.i am thinking of reapplying for visa.
My 2018 Ques.are
VO: why you are going to US? To meet any relatives?
Me:for tourism(my brother and his family in US)
VO:for how many days?
Me:12(we r going with travel company)
VO:what r u doing?
Me:i am doing service for last 10 years at LIC OF INDIA
VO:ask to my wife what do u do?
My wife:house wife
VO:are u internasional travel before ?
Me:Yes ,Dubai
VO:are you traveling before with kids?
Me:yes sir south india and GOA
Vo:any reletives at US?
Me:my brother and family
VO:are you appling before US visa?
Me:yes
Vo:why u dont apply before with kids and now with kids?
Me:my younger son not born and my elder son have not passport
Vo:sorry you are not eligible and give my all 4 passport back
Me:sir just give me 2 second and i tell my leave already grant and if i dont come bake then my company terminat me. So i definatly come back sir
Vo:sorry next time
(interview in gujarati langaguge)

What is rong in this???? And kindly do guide for when we reapply for B2 visa? Can we apply Immidiat?
Thanks

[Pankti Shah]

My family B2 visa rejected in 2014 and 2018 now I am thinking about reaply for crismas vacation with my wife and younger son only.can I apply with out my big son or with?
my profile
I am a government employee from last 11 year. My wife is house wife. Two children age 8 and 3 years old. In 2014 me and my wife want to go and stay with my brother already in USA. And in 2018 we full family apply and purpose is tourism and go with one of the best tour package but rejected again.
now I need suggestions for apply in November with my wife and younger children. It's okay or not please guide me
thanks

[Pankti Shah]

Thank for reply sir
My self paying for the trip, my salary 1,25,000 Rs P. M
I travel before Dubai.
It is Okey sir or not?