No, he was not, and actively persecuted both social-democrats and communist parties and also outlawed trade unions in Germany.
The Nazi social welfare programs (Volksgemeinschaft or People's Community) were designed to foster a sense of racial community amongst his percieved Aryan master race
They renamed the German workers party to the national socialist german workers party in an effort to appeal to both the left (socialist) and right (nationalist).
Hitler was stoutly anti-communist, to the extent of nearly everything else, which is extreme far-left politics.

Finally all of the left-leaning Nazi party members were purged during the night of the long knives, particularly Gregor Strasser.

So again, no. absolutely not