They're not defending Carney. Just stating the fact that PP is significantly worse. A fact that's being muddled by unfounded criticism of Carney. Some folks who didn't have a strong anti-PP opinion like a family member of ours is asking whether we shoulda voted for PP if Carney is bad, after hearing unqualigird critique of Carney. It's important to criticize Carney for his fuckups but that should always be grounded in the relevant PP context.
As for NDP voters who lent their votes to Carney this round, we don't need unfounded critique to know the NDP is better for us.
Basically it's important to tailor one's message depending on the audience in order to achieve the desired understanding. Most of us here know what's up politically.