Why is Kuja such a noob?

[The Crystal]

You didn't include, "He lost to the party as part of his plan." Your first statement was far more inclined to try and poke fun at Kuja.

As for having many temper tantrums, I had never seen them, I've seen him get annoyed threw the game, but I've never seen him really get pissed, and Kuja made it clear that Brahne's soul was a powerful one, with the quote I've already provided. I didn't make a theory, as I never really made up actions or events that happened, I made an interpretation of ingame story events and dialogue. There's a difference.

Anyway, for the most part, I think I've said my part, except this: You often provide your ideas/whatever whenever Sephiroth is badmouthed in a thread, don't act as if I cannot do the same. Thanks, bye.

My intention was never poke fun at Kuja. He is a great villain, one of the best(if not the best) of FF. But I accept the way he is, I know he is not perfect.

The problem is... You discarded all of Kuja's character(his other tantrum and pissed off moments) and all the good reasons that made him have that anger tantrum(the fact he worked his entire life for that moment, only to discover that everything he did was useless, because he was going to die anyway), just to give support to your crazy theory.
Yes, a theory. You made up actions or events that happened, by stating that Brahne was influencing him. Something never stated or hinted during the story.

And I use facts and evidences when talking about Sephiroth, not crazy theories. For example, I know that he lost to Cloud because of his stupidity(arrogance). I don't try to make excuses for his defeat, to make him look good.
I accept the characters the way they are, and you should do the same.

Anyway, I dont think Kuja was stupid at the end of the game. As I said before, what would have been the not-stupid thing to do?

Despite being the most powerful person in the whole world he effectively had no options at that point in time. Thats bound to piss somebody off.

He was in front of the Original Crystal, the source of everything in the universe. He could have tried to use it's power to stop his dead, instead of destroying it. But no, he didn't even try.
That's the only moment in the story where Kuja was stupid IMO.