If there is such a thing as “whataboutism” then it would be bringing up something entirely unrelated to the topic of discussion. It is not “whataboutism” however when you point out rampant hypocrisy and how they are guilty of much worse instances of the exact same thing they are accusing others of. That shows that they are entirely engaging in bad faith and that they do not really care about the issue. In which case there is no point in continuing to argue with such a dishonest interlocutor.