No. They are certainly challenging, and have very smart, very strong students.
But Oxbridge has a level of intensity unlike anything else in the US or the UK. The workload is enormous and the pace is unrelenting. Oxbridge Classics students typically have up to 8-10 lectures / week and 2 tutorials / supervisions. The rest of the time you are doing your own work: intensive Latin/Greek study and typically 2 research papers (aka essays) that you write every week (and defend in that week’s tutorial/supervision). And, you will note that they reference ‘vacations’ - that is not a synonym for ‘holiday’. It’s when you ‘vacate’ your rooms and go home to do all the work that didn’t get done during term and study for the exams you take as soon as you come back.
Frankly, unless your reasons for your grade 9 & 10 marks are linked to some situation-specific circumstance that is completely resolved, or it was simple immaturity, and you are now a self-motivated, self-disciplined student I think the UK is going to be a challenge for you, as it requires those characteristics.
And, although UK unis aren’t really into GPA, some of them have set minimums- and your current GPA would need to come up quite a bit for the places you list above. IMO you are likely to need to lower your sights a little further.