This is disappointing, but I can't say I'm surprised.

For those not familiar, Jagex has been going downhill since about 2010 (basically when the founders sold the game to venture capital).

There's a new game by the founders, Brighter Shores. It improves a lot of things over RuneScape in principle, but it still needs a ton of work to make it more broadly appealing (effectively it's still just a bit beyond an -- extremely stable --tech demo; no bosses or minigames yet).