No. We’re looking at a photo of what was predicted to be around a blackhole and seeing what was expected. Blackholes exist, you are off in the exact never never land you erroneously say the physicists are in.
What is actually happening is that you are looking at a composite image, with most of the data inferred algorithmically by people who assume what they are looking at is a black hole.
It’s not a surprise to see a large scale structure at the center of the galaxy. What it is, exactly, is another question.
What it is infinitely more likely to be than a black hole, is a plasmoid.