The chess.com computers (except Impossible) are very weird - they play quasi-optimal moves most of the time but hang pieces randomly.
I'm just too asocial and afraid of human opponents, especially with this terrible kind of clock management that takes people's time but results in me losing anyway (resigning just before my flag falls).
I miss two-move tactics and hanging pieces terribly even in 15|10 rapid and very often end up with 30 sec on the clock, surviving on the increment