Maybe Snipes did burn a few too many bridges over Trinity. Reports of altercations with director David Goyer surfaced during production of the movie, and after its theatrical release Snipes at least threatened to take movie studio New Line to court, alleging breach of contract. That said, plenty of movie stars are, if you pardon my French, pricks. Many of them seem to be doing fine nevertheless (I'll concede that the jury is still on whether Mel Gibson can survive his recent scandal).
Another possible theory, and one I find more likely, is simply a matter of money. Snipes was recently suspected of tax evasion, witholding millions in taxes. Starring in a bunch of these stv flicks is easy money. Even c-movie star Dolph Lundgren receives a million bucks a movie. And his movies generally have a budget of less than five million! Compare that to Snipes' stv movies, which all seems to fall in the 10 - 20 million range, of which at least 10% ought to be Snipes' salary.
Whatever the case may be, Snipes deserved better. Unlike other action stars like Van Damme or Seagal, Snipes had decent acting chops, and regularly appeared in more serious drama movies. Wesley, get over yourself and make Blade IV!