>>280651637>the fact that some random scientist in a secret lab was able to create power levels that rival those of a fucking legendary transformation of an alien warrior raceThis was one of the biggest problems with the Cell Saga to me. Frieza was talked up like the strongest being in the universe, and the next threat after that are a couple of robots from Earth. Bulma's cartoonishly smart, if androids could be that powerful then she definitely would've been able to make some herself and solve pretty much any of the arcs throughout the series.
>>280653454I think that's part of his character development though. Vegeta had always planned to one day kill Frieza, and came to believe himself to be the legendary super saiyan, but Goku beat him to the punch and was the one to avenge their race, and that tore him up inside. After achieving super saiyan himself, he had everything to prove, and let his arrogance take over. I did think Cell suddenly wanting a tournament instead of killing everyone after absorbing 18 was stupid however. Especially since it wasn't even a tournament, and he dropped the whole pretense halfway through his fight with Goku. It was like an excuse to delay the climactic battle long enough for the others to catch up to Cell's level.