For what it's worth, I don't think people have been complaining about Dani's ability to set up fun customs. People just weren't happy with Reach gameplay and were taking it out on those types of 'events.' I've always had a good time playing in Gaf customs operated by Dani whether they were intended to be casual or competitive and know how much effort he puts into keeping those running as long as he has... I do/did the same for CC-satellite groups.
Like Tashi mentioned previously, people are and will be on the zero-bloom 'high' for a while and will associate their happiness with it to whatever customs are running by whomever. Personally, I don't mind who runs the customs, but seeing people knock Dani for all his effort seems unnecessary. Devo, I'd be happy to help as well where I can if you want to give it a shot. Same with Dani. I'm just usually unavailable on the weekends so I almost always miss out on Gaf customs.