The positive reviews doesn't sound much better either.
The negative reviews I've seen doesn't sound like they're from internet trolls. If the negative reviews are getting more upvotes, that may well be because the negative opinions about the game are stronger, despite being in the minority - certainly stronger than positive reviews that ends with "Is it worth $19.96? Honestly, no."
In the few times I've tried developing indie games, sometimes I've noticed that people were going too easy on me. People like to root for the underdog, and they get afraid of giving negative opinions because indie developers aren't perceived as faceless corporations, but as regular people.
People take everything too personally, and they also expect others to take everything too personally. I've had to actively search for opinions on websites that I never visited before to find raw, unfiltered negative opinions about the projects I was developing. And most of them made sense, despite of how harsh they were.
Doom 4 also got a ton of negative reviews early on, because of its multiplayer. Afterwards, the public realized that its true strength is in singleplayer; the multiplayer audience went to play other games, and the singleplayer audience got stronger. This is normal.
Every product at launch sells mostly because of expectations, and expectations are usually inaccurate. Also, it's hard to blame the public for their inaccurate expectations when Strafe advertises itself as a 1996 FPS, even going as far as using the strafe1996.com URL for their website.