Look, not trying to play devils advocate here, but maybe he just misspoke. Like I said it was a mistake. I think it's important to stand up and fight when need be. But the key to that is choosing the right things to stand up about.
Respectfully, I do not think this is that thing. It's also possible he had every intention to keep his word about that and talk to the Devs on our behalf to cut us some slack over the Arena awards not working in the first place. But if the Devs didn't listen to him or rejected the idea he is left to hold all the blame. Just reading the situation from the outside that is the most likely scenario. So, there is a very real chance your are being mad at him for trying to help you.
There could be a lot of reasons of course, but I have my money on that one.