That's not arrogance. He was enraged into attacking Goku. Also, why would he trust his opponent?
He attacked Goku when he left him be. His increasingly bruised ego throughout the battle led to more and more strategic blunders that culminated in him attacking an opponent that had already pacified and had even given him the energy to escape, an opponent he was well aware could end him. This was all done to prove his supposed "superiority", as proven by the speech he gives while charging the beam itself. It.is.arrogance. Pure and simple.
He had grown much stronger via his cybernetic enhancements and his father to back him up. He can't sense Ki so he couldn't gauge that Trunks was much stronger. Frieza also could match and survive Goku on Namek so he sure as hell wouldn't expect this random kid to be capable of killing him instantly.
And what the Hell was Goku rather than another random monkey that still completely destroyed him? Again, if it weren't for his arrogance, he would've been more cautious even with his father there when a random golden warrior popped up.
Context matters. All Frieza knew is that Goku defeated Majin Buu. Frieza grew literally infinitely stronger in just four months of training and, if not for the God Ritual, would have effortlessly killed Goku without having to even resort to his transformation.
He had no way of knowing Goku had grown THAT strong. Even so, he had a contingency plan.
Then why did he feel the need to train for 4 months? Why not 1 month, or even a few weeks? The point is Frieza was expecting Goku to have gotten significantly stronger if he himself went that far in his training.
Now you may say: "Well he did it to not be ****** over again." Yes, and yet still he didn't even think of regulating his stamina, instead letting his revenge and once again, arrogance, get the better of him, despite already having come up with a contingency and training as hard as he did. If that wasn't Frieza, it would be inconsistent characteristics, but it is, so he simply just always finds a way to screw himself over.
Again, not arrogance. That is Frieza's sadism. That is the trait that has primarily screwed Frieza over when fighting opponents.
The two could be interchangeable in this context. Either one works since they basically result in the same thing for this specific instance.
I'm not brushing it off. I'm stating the objective fact that Frieza's arrogance ISN'T what causes him to lose his battles. It's merely what holds back his potential. Whenever Frieza is winning a fight, he always loses due to his sadistic tendencies taking over and causing him to draw things out too damned long.
Refer to all of the above.
Yeah, no. You don't get to brush off the fact that Vegeta is the reason the Earth was destroyed. Kindly rewatch what happened. You clearly need to refresh your mind on the matter.
Perhaps, but the thing about the one-trick pony still stands. Vegeta isn't going to fall for it a second time, whatever "it" might be.