I don't really like system apocalypse litrpg stories. So why am I reading this? An author I like said it's been vastly influential on the web serial landscape. I think it's good to know where stuff comes from, and returning to the source is usually better than messing around with imitators. Hey, maybe it's the Worm of LitRPGs. I still don't like it. It's unimaginative slop that makes me question the interiority of the author.
One thing I can pull out is how gender is kind of... never thought about. This is a story with myriad alien species, not to mention a ton of humans. Everyone is a Man or a Woman, the split of gender is fundamental. It is encoded into the fabric of the world, unquestioned. I'm what, five books in, and there was one offhand mention of a race that has Men, Women, and Nonsentient Third Gender. No named character is anything more complicated than Straight Woman Who Looked Like a Man at First Glance Oh Wait She's Dead Now. Look, I know what I'm getting into here. I read a lot of trash and I don't expect it all to have nuanced takes on everything. But wow! Immersion breaking, makes the author seem like he just doesn't reflect on things at all.
This isn't an isolated instance. Our main character is bumblingly political in such a vapid and shallow way that it feels like the author hasn't given any real thought to politics in his life ever. (Maybe... oppression... is bad? Burn it all down? Make them pay?) Religion and spirituality is relegated to some in-game pantheonesque system. (It's rare any of these stories are written by anything other than Reddit Atheists, so -0 on this. Still sucks.) There's one character who's offhand a vegan, and nobody else seems to have any moral system to speak of. There are a bunch of characters from around the world, but somehow they all feel like americans with an extremely light coat of paint. Like a few dabs here and there to remind you that they're from iceland or ukraine or wherever. The whole thing just reeks of white-guy-american unexamined life.
If you want high-volume, book-published, played-straight progression fantasy that isn't challenging, it should at least be well-written and enjoyable. For that, go read Cradle by Will Wight. I don't think Dungeon Crawler Carl is worth your time, though.