No, it isn't. The defining characteristic of cancel culture has always been using collective online action to have someone ostracized from social or political circles, removed from their job or professional relationships, etc.
>This is generally a precursor to a bandwagon/snowball to de-platform the individual. This happens when a portion of individuals begin picking a side by taking action, sometimes out of caution.
Correct. that is cancel culture, and that part never happened in any of these cases. Simply calling someone names isn't cancel culture. If it were, every opponent of cancel culture referring to "witch hunts", "pearl-clutching mobs" or "Marxist SJWs" would be engaging in the very activity they denounce by denouncing it.