As a true fan and student of sport, I thoroughly enjoy watching the dynasties and legendary singular athletes each and every season. I freaking love Bellichick and his inate ability to adjust to very different team opponents, his own personnel changes, injuries, weather etc etc and how they always come out at or near the top of league. Saban is also a master, (no coincidence they were together in Cleveland) and the Pats and Tide benefit from them, and will continue to as long as those guys are passionate about their craft. Lamar has similar styles, themes, and schemes each year but there are always distinct differences with personnel, depth, injuries, opponents, and they are also able to adjust and still dominate. Michael Phelps, Usain Bolt, Tiger Woods, Roger Federer all consistently dominated their sports and had to adjust as they aged and competition changed.
Root for the underdog if you wish, that's a great feel-good plan. But don't discount the great coaches, programs, and athletes because they win "too much".