Not to mention they are constantly downvoting every public post complain on ledger reddit... that is really pathetic, but I guess their co-founder needs to work on something also 
How do you know who is downvoting the posts and that the admin is doing it? I don't know much about reddit, but from what I do know, you can't see who voted or downvoted what. I checked a few random posts from the ones you added. They show various upvote percentages and based on them and their popularity, all I can conclude is that several people have to downvote that certain post for the percentage to be the way it is.