It is tough to say. But there are red flags. Like when an opinion on a post is repeated a lot by different accounts in the thread but are heavily downvoted and an opposing opinion is heavily upvoted.
This is what I would expect to see if bots brigading a thread are using unpopular talking points.
For example, I see it a lot with anti DNC threads with the same accounts posting similar comments throughout multiple reposts of a single post. If I had to assume what views they are trying to promote, I would say they seem to be trying to discourage democrats to vote by sowing apathy aka FUD.