Its not Whataboutism if those two parties are basically the same entity(two headed ogre) and you just get to "pick" which head is in charge for the term and they are reminding people of this so you avoid the entire tumor not just the part floating above water. Are they wrong to say all the President's for a long time have ignored the Constitution? If they aren't its rather valuable information to be aware of, unless that doesn't fit your political narrative? But saying that, I get where you are coming from, different people and situations create different interpretations and language isn't always perfect at communicating what we intend.

My own opinion/perspective is that Trump is partly symptom of how much our Democracy has become a farce, on the other hand Kamala wouldn't have been half as bad, but I also don't like how little respect the "Left" has for individual rights except the ones they cherry pick ("whataboutism")but Republican Party is also super guilty of that. They want a big benevolent blob of a government that will do much better than you at running your life, their solution to any problem is make a bigger more powerful government and force conformity to that central authority. Now I will admit I don't think they would outright abuse all that power I cannot say the same about hm.. for example Trump and the since Republican leaning factions in the country won't just magically disappear so you have to accept that centralizing government power is not something you get to decide if it will be abused or not. For example if Trump decided to create a "Universal Healthcare System," would that be a completely corrupt cash grab for Private Equity and Big Pharma and would that be a forever tax like the military budget, theft literally legislated into law.