Steamtrade voters (on reviews)

You have 4 negative reps, people won't even read what they are about, they will just vote "Yes".

I mean if you've managed to get 4 negative reps from 4 different trades (so not one trade + friends), you're obviously doing something wrong.

Well, I just took a look at your reputation and I don't think any serious trader would take them seriously since most of them are just "rude" comments or from obvious troll accounts.
The people voting aren't dumb, they just act how they are supposed to act:

Occasionally a review will rely on general statements (e.g. 'Scammer', '-Rep', 'Bad trader'), [...]. In these situations, you'll need to investigate the evidence provided by both sides, view their profiles, and use your best judgement.

In those cases, your reply needs to showcase any proof you never contacted that person or whatever they claim. Like for that one person take a screenshot of their profile and show you don't have them blocked.