I get that for all of them but Forrest seems like a hard guy to not to like or root for.
Griffin is an odd one. He was
very popular when he started and for most of his career ("funny, genuine guy who isn't a great athlete but has a giant heart, etc"), up until the Rashad fight, more or less.
Then more and more newer fans started to dislike him, calling him a "try-hard, an awkward moron who thinks he is funny but is just cringy, plus he has zero heart, look at how he quit against Anderson, shameful display and he is constantly injured".
Then most of Sherdog turned on him after the second Tito fight, called him a quitter when Shogun avenged his loss, and the third Tito bout was the final nail in the coffin, sherdoggers being enraged at him running out of the octagon again, and trying to be funny by giving Tito his post fight interview.
Funny how sherdoggers used to idolize Griffin and hate Tito, that 3rd but really shaked things up.
Actually, the 5 guys on OP's lists have been at time idoles to the fans, then became heavily disliked.
Except for Bisping; sherdoggers used to hate him, and cheered widly when Hendo H-bombed him, and now he has more fans than ever.
Sherdog is a fickle mistress, easy to seduce, but even easier to lose