Biden is fine, he'll return decision-making to normalcy and be a one term President. Then we can try 2 new candidates in 4 years. Imagine the next 4 years with Biden and then with Trump. Which one seems less erratic and dangerous?
Your point is being wasted, and another 4 regressive years of Trump all because you wanted to make a point that won't be heeded or come through at all.
How about the 3rd parties field a candidate people actually want to vote for? Not some fringe ideology.