Doesn't help that the story describes Aeran as better than the MC but there's no effort apart from stat checks to appreciate the MCs skills.
See, here's where subjectivity comes into play because at no moment I felt like Aeran is better or more competent — and I felt that way at first purely because he lacks emotional maturity. Actually, fun fact: in Count fight if MC romancing Aeran trusts him to have their back, he messes up. But if you go about it logically... He was Brissa's mentee,so he should excel at politicking, yet he cannot have a single diplomatic conversation with ANYONE, unlike MC; you can persuade that mother in Rona, the skittish merchant, the voodoo-lady, haggle successfully with imperial folks, with the council, sidestep that senator lady, betray your employer to her mom with zero repercussions... you get it. But whenever Aeran is near, you have to shush him or tell him to reign it in because he behaves like a kid who doesn't want to be there and doesn't try to play nice. Especially when playing nice could get you some advantage or safety. I'd say that as Brissa's student he is a failure, and that's why for me personally it a) stings more that he is still the favourite b) it is clear that Brissa didn't choose her fav based on potential or aptitude, but just... subjectivity. After all, MC has potential that could intrigue Sero who doesn't even take students, while Aeran doesn't.
Like, what did he do better? He failed as Brissa's student despite being given EVERY chance to succeed. He got involved with some very shady ppl due to his lack of foresight (and that lack of foresight is pretty apparent in the way he approaches conversations with every NPC). He managed to fail his ex so much that by the time you meet him, they both hate each other. He decided to keep his friend\lover\peer in the dark about the tragedy that affected them deeply just because. And, the biggest one: he did participate in the fall of the place which, no matter how much he disliked it, took him in.
...gosh, I sound like I hate the guy, but I actually romanced him
(he's getting dumped for Melchior tho)
I mean, RPGs do the thing where the MC themselves respond to circumstances that require historical or political knowledge.
Oh, yea, I am not arguing for the Wayfarer's approach. I prefer to have MC be in-context and figure out context myself. Though there are exceptions where it just bogs you down.
cough Mage Reborn cough
When nobody is threatened by your presence, then you as a reader start losing respect for the MC.
Not me

Personally, I don't think being threatening is smth I value in characters I tend to RP — but we have already established that we might be going through the plot with very different MCs stat- and personality-wise. Plus, I have seen old little ladies and women being absolute jobsworths when faced with men twice their size, that a rando servant being rude and unimpressed doesn't seem like that big of a deal.
It just reinforces the idea that MC and Aeran's relationship is entirely one sided.
It is. I think that in any route that is not MC-almost-dies-romatic-one it is VERY one-sided. Imo he just takes MC for granted in many ways because, as I have mentioned, he doesn't have good foresight and assumes they will be ready to have his back whenever.
But over 3 chapters, there hasn't been any character development.
In 3 chapters we had about 2 weeks (don't quote me on that, I played the chapter when it just came out) of game time pass, I think. Boat trip included. So not exactly much time for any character growth. I assume we are entering MC self-sufficiency era, but what do I know, I am not an author.
Btw, guys. I kept forgetting to ask, but is there a way to solve the tower riddle in ch3 with spirits and all that? My MC kept failing the last step, and I gave up.