Saying the world would have been better off without communists directly states that the ones who killed 90% of the Nazis in World War II and took Berlin should've never existed, the Tsar never overthrown, Cuba to remain a fascist slaver colony under Batista, China to remain under the feudal Kuomintang dictatorship, Vietnam to remain a colony of France, South Africa to remain an Apartheid regime, etc.

It isn't a strawman, it's the direct consequences of what you said.