Case in point - the penultimate episode of the first season - when Rudeus has sex with Eris, and puts on a goofy voice in the aftermath, as he does victory-laps around the ruins of Buena Village. Eris had ostensibly been a daughter figure to him up to that point - blindly following his advice with the belief that he knew what was best for her, while at the same time he had fostered a romantic relationship between them. This is grooming, and if it weren't for the fact that Rudeus looks like a child, it would not have been received with the same indifference. And it doesn't matter that Eris leaves him in the end either, because the reason for her leaving had nothing to do with how disgusting his actions were.
So while Rudeus faces consequences, now in the second season, through the erectile dysfunction arc that is currently in progress - the viewers have had to reflect on next to nothing. To a certain extent, this also normalizes what he did; while most people aren't pedophiles, and agree what Rudeus did was wrong, a pedophile watching Mushoku Tensei might not feel the same way. They may in fact come away with the impression that what Rudeus did was morally neutral, since the series is so popular. After all: "He did wait until Eris was 15 before having sex with her." Oh, fantastic, I'm happy no one was hurt! :/
As for the actual story of Mushoku Tensei - it is competently written for the most part. Actions have consequences, and the show isn't afraid of taking things in new directions. It's interesting to see the varied locales Rudeus travels to throughout his journey to return Eris home, and the characters at times have surprising depth. At times, not always, as the series does a bad job of balancing the wacky anime elements with the attempted realism of a medieval society; like having a magic school where everyone acts like teens from the 21st century; or beast people that literally have a "nyaa UWU" language; or a pervy prince that looks like a celestial dragon straight out of One piece, who locks Rudeus up because he wants to fuck Rudeus' 40 year old master who looks like a 14 year old; or the celestial dragon's superhuman otaku brother, who wants Rudeus to make him anime figurines. The tonal inconsistencies makes it hard to take anything seriously sometimes.
Everyone has already said this, but the art is gorgeous; it's expressive and fluid, and there are some very good shot compositions throughout the show. I also liked Rudeus' inner dialogues when he exposition dumps the audience in some of the episodes. They were funny, as he found himself in darkly humorous scenarios. Eris was especially interesting to me. She clearly has ADHD or some learning disability, and it's reflected well in the character. That being said, not all of the cast was equally as interesting; Ruijerd honestly didn't have much of a personality that I was able to connect with, or really a very compelling character arc, since it ended up feeling unfinished once he parted ways with Rudeus.
The current season has also been enjoyable so far. Unlike some other reviewers I have enjoyed the monster hunting and the temporary companions that Rudeus have come into contact with. They're not very complex, but I don't think they're meant to be too deeply involved in the story either; they fill their roles well enough, and that's all that really matters as far as I'm concerned. Only the confrontation between Sara and Rudeus could have been handled better in my opinion, but I've read that they changed things from the light novel, so I take it that is true. I also mentioned that I wasn't particularly impressed with the whole school arc either; I've read the manga, and I just don't like this arc in general, so I expect if I watch any further that the score might fall from a 7 to a 6.
This is a competent show, but discussions about its writing have, perhaps deservedly, been overshadowed by the discourse around its portrayal of groomer behavior. If I just ignore the unsavory parts and focus on the whole - it is neither a masterpiece, nor is it offensively bad - it is somewhat above average; it is pretty entertaining. So that is what I have chosen to do, with the asterisk [*] that you shouldn't watch Mushoku Tensei. I'm kind of at odds with my own enjoyment of the show here, so I don't endorse you watching it.
