Whataboutism

[Michiko]

When you deflect [criticism] by pointing out flaws in your opponent, specifically using the phrase what about x? This is an attempt to [excuse you] from changing you behavior by painting your opponent as a [hypocrite].

[Raeanne Dimick]

the practice of answering a criticism or difficult question by making a similar criticism or asking a different but related question, typically starting with the words What about?:

[Ernesto]

The technique or practice of responding to an accusation or difficult question by making a counteraccusation or raising a different issue.