I don't think anyone's arguing that you can't turn a program around with the portal - Mel Tucker made $95 million based off of a great year in the portal. But I don't think you can find the ~35 contributors you need to be a solid team in one year. Deion can attract talent, but not all of it. And I get the argument that players on a 1-11 team probably aren't good, but I'm sure some of them can be contributors or develop into that.
A lot of this is overblown for sure, but they will be very thin this year. Maybe he goes and pulls an excellent backup QB from the portal and shores up some other positions, but does anyone believe this team wins more than 2-3 games if Shedeur gets hurt? If Travis Hunter goes down they lose their best offensive and defensive player. I'm definitely too quick to buy into the negativity because I want to believe it, but it's not like they're pulling the top 2-3 guys at every position in the portal.