C. Washburn - TCU
T. Howard - Tenn Martin
M. Perez - Nevada
Those are just a few off the top of my head. Whereas they aren't world beaters, they did as well or better at their new schools as they did at UTEP. I'm sure I could think of more.
Sometimes "quitting" isn't the intention. The intention is to "transfer"...change. Intention is everything.
For instance, have you ever had a job that wasn't a good fit for you, so you changed jobs? It happens.
Not challenging everything you're saying because I agree with you in general, however I can't label a kid a quitter just because he has chosen to transfer. Especially if he has improved at his new destination.