While I don't disagree with you, I think we need to remember the progression of what happened. I think posts like this are upvoted by a handful of groups: 1) Pro-Trump users who do naturally frequent this sub (userbase overlap with /the_donald here since of course we would discuss pizzagate and wikileaks), 2) Real Pro-Trump users and shills/bots who are increasingly using this sub as a battleground, and 3) Users like myself who remember key points in reddit history and think there may be a conspiracy behind it all.

Please correct me if I am remembering events incorrectly:

About a year ago, I would say that reddit was generally pro-Bernie (kind of makes sense given the demographic and my experience IRL with that demographic). /politics leaned mostly toward Bernie but was very anti-HRC - discussion and votes seemed mostly organic. /b4p was created. /the_donald was created and slowly grew. I personally didn't have a problem with either but others did. /enoughsandersspam and /enoughtrumpspam were created and grew. At the time I wondered about the Sanders campaign using some new social media strategy to promote on reddit but it looked like it seemed to be more positive than negative (later to find about that he did and it's called Revolution Messaging).

Around the DNC Primary things started to change. I think everyone knew in April that CTR was coming or thought they came and were ineffective. End of July things just flipped and it was clear to everyone that /politics was hijacked. It became super pro-hilary and anti-trump. It turned into an echo chamber. No discussion. One could argue that reddit is left-leaning and nobody liked Trump but it was way more than that. Anti-TPP (Bernie's platform) turned to Pro-TPP (HRC's platform). Very different than what I experienced in real life.

There was a considerable backlash in the rest of reddit and CTR won the battle for /politics. /The_Donald reacted accordingly. It should be noted that around the same time Cambridge Analytica (similar to CTR but much more big data heavy) shifted their support from Cruz to Trump. The battlefield shifted to /all. Non-political subs became political, voting brigades, spamming, etc. I think the reddit admins did something at this time that was negatively viewed by /the_donald but I don't remember.

Then the whole wikileaks / pizzagate thing went down. Of course since this started with the Podesta emails, it attracted the anti-Hillary crowd. Of course since these leaks and connections concerned conspiracy theories, /conspiracy ate it up.

Then reddit straight up deleted /pizzagate. Censorship.

Then it came out that one of the reddit admins was retroactively changing comments. Censorship.

Then it came out that CTR still exists just rebranded back into American Bridge (Cambridge Analytica also still exists). They are still here.

Today, we absolutely entertain any conspiracy theory around reddit manipulation. Are there a lot of people who don't like Trump? Absolutely - millions just marched against him. Can reddit be manipulated? I think history would say yes. Is it currently being manipulated? Highly likely. From all angles.