That is quite a non-answer. I'm asking specifically, what will Biden do that will "ruin" America? Not what will he do that you don't care for, but specifically, what things will he do that will cause America's ruin -- which is what you seem to be claiming.
I'm not a fan of claiming that "the other side" winning will "ruin America." I've lived through numerous Presidents, from both parties, and have often disagreed, yet I haven't believed those policies would "ruin" America.
I've been against numerous Trump "policies" -- such as his increasing the national debt in a time of the best economy of the last 50 years. In his first two years of office, Trump basically doubled the deficit spending compared to the last couple of years of Obama, adding about a Trillion Dollars in new debt in each new budget he signed -- again, in the best economy of the last 50 years, when tax revenues are at their highest and we should be, at a minimum, lowering the deficit if not paying down the debt.
Of course, with the pandemic we are no longer in the "best economy" and we will current add $3 trillion in new debt for 2020 alone. Now, I don't believe this will ruin America -- it just will require some hard choices and strong leadership in future years to fix (though I must note, with the current atmosphere and seeming lack of strong leadership in either party, I question how this will happen).
In some ways, I'm reminded of a cartoon I saw after the 1976 election -- I was attending school in a very Republican area and personally voted Ford. The cartoon showed a man loading up his station wagon (back before minivans and then SUVs became popular) with the families important possessions, preparing to quickly move his family, and his wife is in the doorway saying something like, "Carter being elected isn't that bad...." Carter, in MHO, was one of our worst presidents but, as bad as he was, he didn't ruin America.
So, again, exactly what is Biden going to do to ruin America?