He did say those things but he also said that they needed at least one more WR and that the OL was a concern that could derail the entire season. He also expressed concerns that the pass rush still wasn't good enough and that they needed to fix the run defense.
I think he was as shocked as anyone the way the came out the first two games. I'm not sure how you can expect him, or anyone else, to predict that after those first two games things would totally fall apart to the extent that they have. But, he did mention during those first games that they would not continue to blow teams out like they did the first two weeks and would have to prove they were a good team when adversity came. I just don't think it's fair to judge a guy based on a few tweets when he writes thousands of words a week about the team and talks about the team either in pods or on YouTube for another few hours. Those Tweets should not be viewed in isolation.
And, I get that some of the content is behind a paywall, but there is a lot of free content available on YouTube and in podcasts.