You're not wrong about the first part and the constitution, by way of how the votes came in, says Trump is the next President.

If that makes Biden derelict of his duty, however, that would be a leap because I don't think Trump has been convicted or otherwise held to account of anything that would be disqualifying.

If the sitting president can eliminate the incoming president because he believes him to be a threat then damn, were right back to where we started.