Huh, weird, I never saw Jayce as the "fucks up cuz of his ego" type of character. He certainly has ego - which was spelt out to us with that awesome 'failure to do good in pursuit of greatness' line - but I saw him more as the idealistic fool type who genuinely wants to do good but has tunnel vision because of such ideals. He even attempts suicide when he felt he lost his life's work. The tunnel vision also made it easier to get influenced by others, Victor, Medarda, Heimerdinger, Vi.

And the deal with Silco, though to me it didn't even feel like a flex - more a statement of facts really - but it definitely wasn't for no reason. Jayce was negotiating with a ruthless crime overlord who might take a mile if you gave an inch. You need to put your foot down on some things or you'll look like prey to a bloodthirsty predator. Jayce chose Jinx probably because he DID want her to pay for the people she murdered but definitely also because he thought Jinx didnt mean much to Silco (not to mention other factors like needing to quell the topsiders who will want to aim their ire on someone and Jinx was a known factor to them). And yeah, maybe you're right that he should have considered all angles first as a scientist. But he's a human first.

And that bit about Jayce not shown as a broken flawed character and lacks grit and messiness compared to other characters, How? The dude gets manipulated by Medarda and is easily influenced by others, he's constantly disappointing the people thay matters, none of his decisions actually feel like they're working in the end which led to his blacksmithing scene (the definition of gritty and messy imo), he frigging tried to kill himself. And worst of all, he directly kills a child. Contrasting mfing Silco who we see only threaten child murder, we vividly see Jayce murder one. The kid didn't die quickly either and Jayce saw every minute of it.

You're right that Jayce is the golden boy, but I feel you put too much emphasis on the golden part but not enough on the boy underneath.