About the Flynn part acting immature, bruh, I'm so tired of the writers making him act like a 10 year old. I get it, he's not super serious at all times, but he didn't act so juvenile in Tangled, so why now? Maybe it's just me, but besides how blunt he can be or how he is around rapunzel, I hate how he's being written in this show overall, it's not cute, it's stupid and cringe
Several people seem to share your opinion, but I don’t. I feel like what we’re looking at is a man who no longer constantly has his guard up, when he’s had his guard up for probably well over a decade.
Eugene is finally able to relax and have fun. His tendency to say stupid things is because he often doesn’t care about what the other person is saying, and so isn’t actually paying attention. He’s acting silly because he hasn’t been able to just be himself since he was a kid. What you’re seeing in the series is all (or almost all) Eugene. What you saw in the movie was mostly Flynn.
Just look at how he acted in both “The Return of Strongbow” and “In Like Flynn”. When he takes what he’s doing seriously, he is so quick to drop the silliness and be serious and competent (and even get frustrated with other people’s incompetence). Even in most of “Fitzherbert P.I.”, when he’s focused on getting into the guard and catching criminals! But for the first time since he was a kid, he hasn’t had to take every single aspect of life seriously, and so he doesn’t. Unfortunately, this causes the pendulum to swing a little too far in the other direction, into that careless territory where he breaks vases and takes a beat to realize he’s just been insulted.
Eugene is still finding Eugene. He’s lived with the Flynn persona for so long that the true crux of Eugene Fitzherbert got lost inside, and now is time for rebirth and rediscovery and learning who he is when the law is not constantly on his backside. And, for the first time, he’s genuinely happy. So, let a happy guy steal food from a gopher and cheer his heart out at sporting events.