This is an understandable and I imagine widely held view but it isn't right. The vast majority of schools worked hard to make these grades as fair as they could given the information available. https://twitter.com/JuliaHB1/status/1296366475549302784

As I set out in this thread schools could only assess what pupils were capable of getting not what they'd actually get if they sat the exam. This would naturally cause some inflation even if everyone was totally scrupulous and professional. https://twitter.com/Samfr/status/1294032966293827585?s=19

On top of this the upgradings from the algorthim have been allowed to stand but not the downgradings leading to further inflation. Many teachers are pretty horrified by some of the grades they've seen https://twitter.com/Samfr/status/1296121417134743555?s=19

It *is* true that unmoderated (even moderated) teacher assessment isn't a great way to assess high stakes exams but not because teachers are unprofessional or dishonest; just because you can't maintain consistency across thousands of different institutions.

It is also true that there is some evidence that implicit biases, particularly around gender and race can play a role in teacher assessment (though these can be mitigated to a degree).