It is interesting that you would use an established character trait of Trump to describe Harris. Since you seem to approve of Trump's megalomania, it seems you want to see such a trait in a president, so in your opinion that should be a green flag.
Concerning your lack of knowlege about Harris, can you name any deeds of any other vp? Is lack of knowlege about a vp anything special?
Also, Trump is not someone that gets things done, but he is good at making people believe that, with his constant self display. As you have observed, he is all talk. If cought in a lie or a blunder, he repeats and attacks. Instead of giving reasons why he would be a good president, he gives reasons why the other candidate would be a bad president.
And unfortunately the last two elections were all about voting for the perceived lesser evil. Not the better candidate, nor politics.
And this election again it is not about the better candidate, but about slinging mud at the other candidate. And unfortunately it works, since the election system is broken - Trump did lose by popular vote in his first election.
They should talk about politics, not people. This distracts, as it is too easy to attack people, like their age...