I've read elsewhere that Trump is also implying in his tweets that Speaker Paul Ryan is also to blame for rushing a poorly crafted Bill.

Trump, as witnessed in his history of real estate dealings gone wrong,  has a habit of quickly changing tack to other projects and saddling former associates in a past project's failure.

This, like his whole byzantine approach to date concerning Obamacare, is clearly a self-defeating tactic in politics. You simply become isolated and without friends and allies if you follow such 'blame-everyone-else' tactics routinely in politics.  Whatever the advantages of 'lone wolf' approach might be in the shadier corners of the business world, it really doesn't work routinely in politics because politics, despite its rough and tumble, winner take all nature, is ultimately a team sport and success depends on retaining a modicum of confidence,  respect and loyalty of colleagues.