It's taken me a few days to put together the things he said, bits and pieces of which seem to be scattered over all corners of the interwebs. It's kind of hard to piece it all together - the biggest thing that stood out to me is that most of it consisted of his typical rambling nonanswers. He was so deliberately vague that there was hardly anything of substance to grab onto.
At any rate, I thought THH's quote may or may not have been a parting shot at his teammates on the ice, but was definitely a swipe at the organization as a whole for not doing a better job of adding players who could help them compete. If so, that's a valid criticism for a lot of his years here. JR was hit and miss; he had a tendency overcommit to the wrong guys and let some good ones walk, and his big-name FA acquisitions usually failed in spectacular fashion. I also came away with the impression that it really started to wear on him over the last couple of years in particular. Of course, if "a couple of years" is to be taken literally, that two-year period coincides with RF taking over and committing to the draft-and-develop philosophy.
Maybe Staal was burned out after watching his team slog through five years of mediocrity and two more years of a rebuild. I can see how that would drag a guy down, but at the same time, a leader has to be able to see the way forward. All of us can see the things that are changing for the better from our armchairs. If he couldn't see it from inside the organization and commit to bringing his best self, it was time for him to go. He thinks he has a few more years of good hockey left in him, as long as he's given significant time in the middle. If that's true, there's no way to defend his failure to bring good hockey to a team that gave him that exact opportunity along with the captaincy.
There's no need for him to place blame, because there's plenty of blame to go around. While he pointed a finger at his old team, the other three fingers pointed back at his failure to lead his troops through the peaks and valleys, his failure to start multiple seasons on time, and his 0.47 point-per-game pace in a contract year in which he made almost $10mm. The whole arrangement was no longer working; both he and the team needed to go in a new direction. Best to just acknowledge that the time had come to move on to the next thing.