My friend and I were denied a UK visit visa to attend an on-site interview for a tech company

Last November my friend and I got invited to attend an on-site interview for a big tech company in London, and we were both refused a visa for different reasons.

The company was going to support our travel, which was stated in our invitation letters as follows:

[Company] guarantees that [Name] will have adequate funds in his possession, as well as return transportation.

They also gave us itineraries that include flight tickets and confirmed hotel bookings, which we provided with the application. We also provided our fathers' bank statements with enough balance and stable monthly salary transfers, and we provided statements from our universities that we are students that are enrolled in the current running semester.

I was refused, as follows:

I didn't provide a source of funds (HR letter) for my father's salary that is showing on the bank statement, so this explains the first point. However, the other points don't make sense whatsoever because I am still a student and in Egypt, most students live with their parents and are supported by them, which doesn't make sense why they expect me to have my own financial assets in Egypt.

I plan to reapply again to attend another interview for the same company, but this time I am providing a letter from my father stating that he supports my living and will support my expenses there for the two days of my visit, my birth certificate with my father's name, an HR letter from my father's work and the contract of the current apartment my father owns which we have lived in for the last 12 years.

Will this be enough to satisfy the ECO? Also, should I write that I take allowance from my father, knowing that I can't really demonstrate this in whatever ways the ECO looks for other than mention it in the statement my father will sign.

Edit 1 Some extra info:

I provided 3 bank statements. The first account has a part of the salary transferred to it every month in USD and this part is withdrawn normally. The second account has the EGP part of the salary transferred to it, along with some instalment payments for a loan and credit card payments. The third account has the amount of the loan in it since 6 months with some small withdraws, the deposit of the amount of the loan is annotated as Internal Transfer, and on the second account the same amount is annotated as Loan, and then the transfer operation is shown.