DALLAS — Big 12 Commissioner Bob Bowlsby had a dire warning Monday for anyone who likes intercollegiate athletics the way they are now. “You’re going to hate it going forward,” Bowlsby said. “There’s a lot of change coming.” During his opening address at Big 12 football media days, Bowlsby talked about growing financial constraints athletic programs face going forward and the “strange environment” that exists with class-action lawsuits against the NCAA and its …