Starmer actually set up an inquiry into the whole affair and made big changes as the result of it (has the beloved Boris done anything about an inquiry into the whole covid fiasco that caused thousands of unnecessary deaths yet? ). He also took responsibility and apologised for the shortcomings of the CPS. He did that nearly ten years ago. So he has actually done something about it. (MaizieD Tue 08-Feb-22 12:04:26)
In other words, Starmer has been held accountable. "He also took responsibility and apologised for the shortcomings of the CPS"
If Boris Johnson had done this - "partygate" would be over by now. The way to defend yourself is to be honest and open, admit mistakes if they were made, or - if you think they weren't, explain truthfully what happened. What Johnson has done is point his finger at another saying, "well, what about him. In other words he's used the technique of responding to difficult questions by making a counter-accusation. 'Whataboutism' - it's almost at playground level and is certainly not the way a mature individual in high office should conduct himself.