I spent five years in Oxford, three as an undergraduate, two as a graduate student. I do not regret any of them. I enjoyed the whole five years. When I left, on the other hand, I wasn't that sorry. There were things wrong with Oxford then, and there are doubtless things wrong with it now. As with other universities. In my experience - not backed up by any survey data - most people enjoy their time at university, though some also don't; and most have a few good memories of the place after they leave it, sometimes even a lasting attachment.
For such reasons, I think that this miserable column probably tells you more about Tanya Gold, whom (I should say) I don't know from Agatha, than it does about the University of Oxford - 'bitter, lonely, rather boring'; people everywhere weeping and crying and sobbing; wretched dons who were also 'either horrible, or miserable'; 'three tribes [of students]... gap[ing] at each other with mutual incomprehension'; one tribe self-satisfied, another terribly unhappy, the third bewildered; and, withal, Oxford for most of them 'terrifying'.
The whole piece screams to me of one thing only: misanthropy. Make that two things: someone with a problem of her own.