Why were you against the world title run?
As for his health, that's Bryan's fault and the fans didn't know. The reality is, with how concussions are looked at today, he should've never made it out of Shawn Michael's training camp.
There were numerous reasons. Let's see, off the top of my head there was
1. Me liking Batista more. (For various reasons in itself, including him being cooler, funnier, nicer, and him going on soon after to release a great movie that would have brought the company a lot of much needed good publicity and possibly even money if he had still been around and as champ at the time of release. You know, minor things people say are important to what they want for a champ, like "have personality" and "be successful".)
2. Me thinking there were more possible storylines with him as champ. (Orton feud would have been bad yeah, but he could have still turned heel soon after and fought numerous people, including Bryan if you really wanted to go down that route. There was no reason he couldn't have even won it then, if you wanted! There was no reason they couldn't have both had title reigns that year aside from petty fans.)
3. Me really not looking forward to what they wound up doing, which was ultimately give him a bunch of shots for no reason, always thinking they could wait to pull the trigger. (Hated it with Luger. Hate it with Dean. Hated it here. If you're not going to pull the trigger on someone and make them a star, stop teasing or making people think you're trying. Just move on to the next person you'll actually bother with. It aggravated me to see Cool Guy Luger get years worth of title shots, and never hold the gold. Then when he finally did, he lost it the next day. Fuck that. If you really don't care for him enough to trust him with an actual reign, don't give him a reign, and move the fuck on to actually anybody else instead of handicapping your title scene and promotion with years of stalling. It was years with Luger, ultimately years with Bryan, and currently years with Ambrose. Dumb, dumb, and dumb.)
4. Me thinking Bryan as champ would have busted. (Immediate feud with Kane that was supposed to continue for months, ending with him being squashed at Summerslam by Brock instead of Cena taking his place? Yep. Yep. Yep. Didn't expect it to be that bad, but expected it to be bad.)