Destroying confidence in the electoral system and other pillars of democracy (media, courts) is their goal, it’s not just pathetic whining. Then they use that lack of confidence to push strongman powers, restrictive voter suppression laws, and other crackdowns.
We are ten years into allegations of widespread election fraud - only for elections Trump or republicans lose, mind you - for which Trump and allies have either not produced evidence, or claimed evidence which was subsequently debunked. And blatant contradictions - such as celebrating wins under the same laws and practices while confidently declaring theft for any losses - are now the norm.