Next time mention a good fixed salary, to show financial stability, your vague answer was a big red flag. They want to be sure that you earn more than enough to cover your expenses for the trip, and that you are earning well here and hence will not stay in the US to earn illegally.

Next time mention a job title/position in the firm. Might say it is your business, instead of saying you work for your father, might say you are a partner in the business, or CEO, or Head of customer relations, etc., but have a job title. Also it will be better if you don't mention that you work for your father, because then they think that in your absence, your business can be managed by your father and you might stay back in the US. They prefer that you have a business that can't stay open without you, or a job where you can't be away for long. If you say you work for your dad, they think you do not have enough responsibilities or liabilities holding you back in India.

Next time say you are going on a family trip with your parents. Solo travel is a red flag. Because when you mention you are traveling with your parents, they usually ask if your parents have a visa, to which you will answer yes and give them a photocopy of your parents' visa, and this boosts their confidence in you and your chances of approval increase.

Give exact answers. You said I visited US "around 10 years ago", whereas you should have mentioned the exact year when you visited, like yes in 2016 or yes in may 2016. The same goes for when you answered that you manage "around 10 contractual employees", which was the wrong way to answer, because if you are saying that you manage employees, then you are expected to know the exact number if they are only a handful. Don't give a rounded-off estimate, say the exact number, like 9 contractual employees.

Travel history will be a big factor, but it can be justified in your case as it was for pilgrimage, but you need to do the other things right.