Um… yeah? He’s come out and said things like that in the past, where they’ve made a mistake or changed direction.
Obviously there’s going to be a limit to what they come out and say, but it’s not like they’re always sweeping things under the rug when they don’t go well.
“Phil Spencer admits first party output has been weak”
“Phil Spencer admits the initial Xbox One reveal was a mistake”
“Phil Spencer admits Microsoft made wrong decisions with Xbox One”