I agree there have been silly mistakes such as Macron's AZ slip up which was hastily corrected. But the AZ blood clot situation has been well covered here in France. It's only belatedly been addressed in UK after they denied it was an issue.
There has been a number of negatives concerning the AZ vaccine not just blood clots. The effectiveness S Africa came up with for instance, trial stopped. Some doubt cast on the age demographics of people used in the trials. Personally I also wonder about the demographics concerning which vaccine is used where and how they decide. That seems to have extended recently where some will now only get the Pfizer vaccine.