Went after Bowser? Isn’t Bowser like the central villain character?
Gary Bowser, dev behind Team Xecuter https://www.theguardian.com/games/2024/feb/01/the-man-who-ow...
GP may be referring to Doug Bowser [0], former president and COO of Nintendo of America, but a brief search didn't turn up any reasons why Nintendo would have ousted him.
[0] https://en.wikipedia.org/wiki/Doug_Bowser
Gary Bowser, dev behind Team Xecuter https://www.theguardian.com/games/2024/feb/01/the-man-who-ow...