I have to say I have a similar experience to K Bennett.
I’m pretty new to Zwift, but I find that there is pretty much no group ride that I can participate in that is a “group” ride. Today I entered the sub2 2 hour endurance ride with the instructions that anybody riding off the front would not be chased down, however in reality with 157 starters when the ride got going within 20 mins half the riders were in front of the leader and by the time we were halfway up Boxhill some were minutes in front of the leader. So much so that the leader even put out a message that he would have to try and bring the pace back because he needed to bring his heart rate down because he was recovering from a cold.
Clearly people are using the Sub 2 ride as K Bennett suggests and feed their egos to show how they can beat all the slow people and the leader is responding to that. Today’s ride was certainly not sub 2 and after an hour I was 1.30 off the leader and I was by no means at the back, there were people behind me down the road. At the hour point I gave up as it was clear there was going to be no group ride for me today.
There has to be a way of controlling these rides. Perhaps some sort of block that stops you getting ahead of the leader or only by a certain distance? That way the leader could well and truly control the pace.
Anyway the long and the short of it is for me after this mornings ride I’ve cancelled my membership. After all what’s the point? To me Zwift is about community riding. I’ve been a member for 3 months and have yet to participate really successfully in any group event. That might be due to my shortcomings as a cyclist (I only have an FTP of 159) but this morning sealed it for me. I’m not going to bother again.