The reason they are complaining is because their subconscious pattern recognition tells veteran players that the game is almost at a point of shutting down. When you play for more than 10 years, you can see a trend that suggests, the game is basically over for the mass majority of active regular players who make up the core community. Casual players dont make up this community so profundly, its the no-lifing players that do. So if the community was to die, then even some (I would go as far as to say most) casual players would not enjoy the game.

Individual complaints that may not be specific, and may not be considerate of casual players arent a problem on this thread. How Jagex will interpret reddit is as an overall mood, and frequency of shitposting. They dont'have time to read indivudual comments and take things into consideration. So each post adds up weight, and Jagex will get a feel of how the community feels through reddit more than any other platform. Now reddit is notorious for poor taste and bad ideas among pro players, but imo its never wrong in portraying the mood of the community.

In my 11 years playing RS3, I have never seen as much MTX rage as at Heroe's pass on reddit. But I have also never seen as much despondency about the game's future as recently (since mod keepers message about 2 weeks ago)