I’m not a fan of SCOTUS, especially right now, but it’s a little too early to be getting out the pitchforks and torches. Let’s see what they come back with first.
There is very little likelihood that they agree with Trump’s proposal for complete immunity - it’s much more likely that they try to draw the line between official and private acts, and then remand the duty of determining what buckets his acts fell into down to the lower courts.
His lawyer even admitted as Amy Coney Barrett read off his indicted acts and asked the lawyer to respond with private or official, for nearly all of them he answered private. That is a big deal.
What Trump REALLY wanted here was a delay on the proceedings until after the election, and they likely handed him that. His game plan is sickeningly obvious - run out the clock, win the presidency, quash all court cases. Continue performing and crossing things off the corrupt actions list.
He will also figure out some way to get rid of Georgia case, although it shouldn’t be that way.