This is a misrepresentation of the prophecy in the prequel, which is confirmed by Lucas to ultimately be about Anakin, not Luke.
Besides that, being the Chosen One has never stated to bring a large amount of power with it, only that they'd bring balance to the Force, which is not something directly correlated to being an all-powerful being.
(Btw, I think the prophecy is a ridiculous plot element, even after the three prequels we know more about Snoke than about the prophecy, which is saying something.)
I agree with you on the fact that Rey is incredibly powerful for someone whose Force has just Awakened. There seems to be a general inflation in Force Power if you look at the production order of the movies, with each movie having to outdo the previous one. Of course, this also corresponds with cheaper technologies and better CGI. Episode I-II-III can be explained by the jedi having trained for a long time and being actual masters of the Force. Episode VII and VIII don't have an in-universe explanation for some of the feats that are shown yet. Maybe there will be, I hope there will be, because if there isn't one it would be detrimental to the trilogy as a whole.
This is a pretty emotional point and I have trouble understanding what you mean through all the rage so I'll only talk about the incentive to watch Episode IX.
Seeing as how you talk about why you feel why you don't want to see IX, I'd like to tell you why I feel I still do.
TLJ has mainly been about failure: Luke's failure to train new jedi, Finn/Rose's failure to find the codebreaker and save the resistance, Poe's failure to follow orders, Leia/Hondo's failed leadership, Snoke's failure to see Kylo Ren's betrayal coming, Rey/Kylo's failure to turn each other to their respective sides, even though they understand each other better now.
To me, it is interesting to see the outcome of all these failures, because you are supposed to become better from failing, which is the exact point Yoda makes as well.
I expect IX to have a timeskip in order for both the Resistance and the First Order to reform themselves in some sort.
We see in the end of VIII that Rey and Kylo still have their Force Bond which can mean several things (is Snoke still alive? Was the bond not is doing? If so, whose was it?)
We know Rey and Kylo will meet again to decide the fates of both the resistance and the First Order
We know Rey has taken the Jedi Books with her onto the Millenium Falcon, could this save the Jedi?
We now know that the Force strives for a balance, what does that entail? What are the consequences of this?
We still need to know why Rey is so powerful (In my opinion this needs to be answered, could also be connected to the above)
However, it's okay if you don't like this movie, nobody forces you to. Nobody forces you to watch the next one either.