This is, again, Trump playing himself, but his supporters will view it as genius.
"His" Bill, which he had no part in planning or writing, is a dud. It fucks over his voter base, and the primary base of House and Senate Republicans, who hate it. They want to get re-elected, so they sure as hell don't want to see their constituents lose health care coverage.
Trump is just deflecting blame for the Bill's assured failure onto Congress. What "more important things" does Trump have to do than ensure the health and safety of the American people? Nothing. But, again, his sycophants will go to the hilt defending this bullshit.