Thank you for this very valuable contribution to what is becoming an interesting debate on the Oxbridge admissions process, and on the role of interviews in particular. No doubt
@Yk295 will find it helpful, as will others who are considering an Oxbridge application.
I hope you don't mind my highlighting the point you make that sometimes the atmosphere at these in-person interviews can be very unpleasant. In my research, I have logged numerous instances of candidates - including those who have been successful - ending up in tears. It is much to your credit that you kept your composure and earned a well deserved place.
Applicants to Oxbridge should be aware that, as one source puts it, "by the time you are sitting in front of your interviewer, your chances of success at Oxford are around 1 in 3 – and about 1 in 4 at Cambridge." I am not suggesting for one moment that this fact should put people off applying. Nor am I suggesting that applicants will always have negative experiences of Oxbridge interviews. But it does, yet again, raise questions about the validity of holding these interviews as a key component of the application process.
I have been accused, in this thread, of lying or twisting the facts. But the reality is that very many members of the academic and research community, including Oxbridge insiders, have serious concerns about these interviews and the effect they have on UK university admissions in general. There is one fact of which we can be certain: there is no evidence to show that interviews are any good at assessing academic potential; but there is much evidence to show that interviews can be both unreliable and subject to both conscious and unconscious bias.
As the source I mentioned above goes on to say: "The truth is that some deserving applicants with apparently good chances miss out on places each year, whereas others who apply to Oxbridge as a ‘long shot’ are given places". Of course, no application process is ever perfect but I cannot call to mind any other UK university that would intentionally fail between two thirds and three quarters of the applicants that it puts though such a gruelling process. I am not going to provide a link to the source because it is one of the many organisations that charge substantial fees for consultations led by senior members of the Oxbridge applications teams.
At the end of the day, people either have faith in these interviews or they do not. Provided that potential applicants are fully apprised of what is involved then it is purely a matter of choice whether or not to press ahead. But now that the interviews are being held online, it is difficult to uphold the claim that they are 'mini tutorials' that accurately replicate either the Oxbridge ambience or the teaching style that successful candidates will encounter.