I remember back then that there was also evidence that China ran some kind of bot campaign[1] but no one really cared and it was never brought up. Ironically your second source says that but again, no one seems to talk about Chinese bot farms or election interference strangely. That same source talks about all the countries that do this. I assume this is pretty routine and the US probably does it in other countries. I don't know why Russia is focused on for this in 2016. I have my guesses.
But then there were investigations into the Russian election swaying campaign. I remember Facebook said that there was no evidence the ads they bought had any impact on anything[2]. There were also groups the trolls made. It's completely unclear what conclusion to draw from them.[3] The article says people mostly didn't follow the groups but that their posts reached people. What conclusion can be drawn from this? Is there any evidence the posts changed people's opinions? Also, one of the weird and counter intuitive things about it is they targeted left wing people.[4]
So I don't see any evidence that an election was significantly swayed. I didn't see it in those sources. I am not trying to make this a left/right thing. I am just saying that yes, there are bot and troll campaigns all over the place. But I don't know if we should conclude that they significantly swayed an election. It's just something to keep in mind. I brought up the China thing because I would think if it was actually a concern then people would have talked about it but how many knew that China, or Venezuela or Iran, were involved in this?
[1]: https://www.reuters.com/article/us-usa-election-china/trump-...
[2]: https://fortune.com/2017/11/01/facebook-google-twitter-russi...
[3]: https://www.technologyreview.com/2021/09/16/1035851/facebook...
[4]: https://www.reuters.com/article/usa-election-facebook-russia...