They were operating in the context of the ashes of World War 1 and disintegrating empires. The total collapse of centralized authority and subject nations forming governments independently can hardly be considered ‘too early’.
Considering it ‘too early’ in the sense that roving bands of monarchist paramilitaries were still running amok unchecked and (then legitimized by the government?) Yeah, bad time for all who didn’t support Prussian hegemony.
A whole crusade just so Breitbart articles can get posted comfortably with only gentle downvotes as pushback.
That I think isn’t quite the case. The uprising occurred in the time period after the Armistice and before the 1919 elections. The Weimar government prior to the 1919 elections existed solely on the legitimacy inherited from the Kaiser. The Spartacists were extrajudicially executed a week before the elections. The constution wasn’t written until the following summer.