AT this point... i dont think if he were release... he would start on ANY TEAM. I think all teams are set with that they have at QB
That's not the same as saying he isn't worthy of being a starter. At this point most teams either have their QB in place, either with the one from last year, or a free agent acquisition or draft pick. And even if teams feel Dak is a better player than they have, they may have already committed a big contract or a high draft pick to the position, and can't walk away from it. Accordingly, your comment only speaks to current opportunity, not talent level.
Had Dak become an unrestricted free agent when his contract ended back in March, his opportunities would have been very different. They would be different next year as well.
But if you are going to claim Dak is only worthy of being a back up, you have to be able to point to 32 QB's who are more worthy of starting than he is.