The MAGA crowd is full of resentment and hatred of "the other", the "libtards" and want to see it all come down. He was a stronger candidate, I fear, because he fed them the sour gruel they hungered for. It sounded delicious to them.
On the other hand, Kamala offered a vision that was aspirational. Americans really don't like aspirational visions. Stating the obvious here, I suppose.