One of elites easily beat the living hell out of him. Two of other RG's tried to protect him yet they failed stop the incoming attack of one of elite solders means that they have no hope against Elites. If they didn't went to help SK even when he's in danger then it means that they were defeated. It's that simple and the manga conformed it. You can think whatever you want but the fact remains the same.
Nah, Man if there is someone more capable than Jugo then that guy'll be the next emperor. Same thing happened with Ishida. Why do you think Yhwach decided to announce Ishida as next emperor? Because he has the potential to surpass Yhwach. Means that one day he'll be stronger than him. It proves that strength is the main aspect that they'd look at while choosing next emperor. So if everyone considers Jugo to be next Emperor then it means that he's the closest to Yhwach in terms of strength.
Your logic is correct but it can't be applied to Kyoraku as he was having problems against one of lower ranked quincy.At first elites were easily annihilated by 0 division. Even that version of Elites were stronger than Kyoraku's opponent. No matter how badly you look at it. Kyoraku can't make it up to Jugo. The best I can see is Kyoraku beating one of elites (No power up) with his bakai.
Jugo > current elites > 0 Division > Elites without power up >/= Kyoraku bankai > Lower ranked quincy.
I'd suggest you to reread every panel that involves Aizen or at least try to read his wiki page for a quick reference. For starters ,Aizen reached his peak as a shinigami which is why he went after other powers such as hollowfication etc. For a shinigami reaching his peak means achieving the bankai's full power. If the gap b/w their shikai is that big then the gap b/w their Bankai's will be more or less same.
Yea thoes shots caught him off guard he did not know what to expect an he was all beat up so if he did have more power to use it would have been hard to use it in that state so if he was beaten an did not use full power yet then the same can be said for the other RG members,just because they could not stop his attack does not mean they can't beat him they won't even useing bankai at that moment...an yea I know they were defeated alot of the people that aizen defeated also did not use bankai when they should've.
Naw all I remember is Bach saying uryu can surpass him not jugram....lol jugram won't even able to steal Yama bankai so I know he's not close to Bach.
Well first off kyoraku was about to end that Quincy life fast but thanks to his vollstanding he was able to survive an he shot kyoraku right in the face an kyoraku stayed on his feet an still contuined fighting....second kyoraky shikai was not good for Ann opponent like him cuz he's long range I don't remember kyoraku use anyone if his shikai abilities to be exact....an like I said before Yama saying that ukitake an kyoraku,when fighting together are stronger than anyone to come before an ever sense speaks volumes about their power so one if them alone should be very strong if use their full power....naw I see kyoraku having to go bankai against one of the elites but not have to use its full power if they are not useing vollstanding.
Naw by peak I think he meant physicaly he wanted to be stronger physicaly.