They started off with the competitors data, and then moved on once they had their own data though? Not sure what y'all complaining about.
They made an effort to improve the product, but because everything in tech comes with side effects it turned out to be a bad decision which they rolled back. Sounds like highly professional behavior to me by people doing their best. Not everything will always work out, 100% of the time.
And this might finally reverse the terms of games being >100gb as other teams will be able to point to this decision why they shouldn't implement this particular optimization prematurely