It's wild to me that, given all the WR injuries in the NFL, Michael Thomas still can't get a shot?

Pretty much what the two above said. There's a lot of breadcrumbs related to insubordination, suspensions, and going against the establishment in his time playing and I am pretty sure he just falls into a group of players who organizations aren't willing to take the risk on. He's older now and too many questions about what he has left in the tank compared to the off the field noise he brings to the table.