It is a really good speech.
Press has already labeled it delusional and Trump lying.
Twitter - This claim about election fraud is disputed. No retweets, likes, etc. Suppression of the speech by big tech.
Facebook - roughly that voting by mail is trustworthy and fraud is extremely rare.
As long as Trump does not acccept the result, most of his voters will not either. It is very important for government of the people, for Trump to stand his ground. Ultimately it is up to the people, because we outlast his presidency.
Even if he did, I don’t know of many people who will.