This is not a valid QR code, a valid one has the position boxes at 3 corners (top left, top right and bottom left). You have one at bottom right corner which shouldn't be there.
So this is either invalid or it is rotated 90 degrees clockwise or maybe it is mirrored horizontally. That means we already have 3 different possibilities.

The second problem is that if it is rotated or invalid, the mask pattern is missing which means we can not begin to decode the data that we already have if we don't have the "key" needed to decode it.
We could decode using all patterns which adds another 8 possibilities.

You're already missing a lot of characters, this also adds more cases to check increasing the complexity even more.