Technicalky there is no evidence of him winning anything. Time will tell how actual votes went. Most people voted against Trump, for anyone as long as not Trump, as most dislike him a lot for their own reasons. 79 million Biden votes against 73 Trump votes.
No. Enthusiasm is not a sign of a win. It just shows how more people hate Trump than love Biden. Bit they'll vote Biden as long as Trump iss out. Many did
Morris Rashad
To believe Biden won means you have to believe that Biden was more popular than Obama at his peak.