I'm known to do something actively, constantly, and on purpose. When I accuse another person of doing that thing, its a very good reason to cast doubt on my claims and motives. That is a perfectly valid argument.
"It's suspicious that well known sink-pisser Larry is accusing Bob of pissing in the sink" is not whataboutism.
I'm known to do something actively, constantly, and on purpose. When I accuse another person of doing that thing, its a very good reason to cast doubt on my claims and motives. That is a perfectly valid argument.