Reddit, and other forums, don't follow that though. Sure the average peson will come somewhere to complain more than they would praise but not all forums are just echo chambers of negativity. Reddit has just as much positive/civil discussions as it does people venting/upset.
This forum has just been in decline for years so not many are left compared to the activity it once had. So you'll tend to get more of the extremes since there is nothing to temper them.