I really liked what this show started as, a reverse isekai that finally does something we've been begging for years, a CROSSOVER between different animes. It creates generic anime heroes and characters from many existing shows and pits them battle royale against each other. The vast majority of the characters are fleshed out well, and coupled with a strong OP, great voice actors and amazing art, for the first half of the show I thought I was watching a masterpiece.
At some point, the writers deemed it necessary to buff the antagonist in order to counteract a plot hole they created in their main character's strengths that allowed them to do almost anything the writers dreamed of. From there, they essentially wrote themselves into a hole by making the antagonist essentially unkillable and came up with several elaborate and extremely boring battle episodes which ultimately were ultimately meaningless and overly drawn out.
I'm trying to avoid heavy spoilers so I'll just say this. Like many great shows (Game of thrones and Kado being a shining example of this),the writers created this wonderful world with tons of likable characters and a solid plot. At some point they remembered they needed to wrap up the plot and were like HOLY SHIT WHAT DO WE DO????
Although this show was never quite the trainwreck that Kado was, the writing quality took a massive nosedive after they started trying to actually defeat the main villain. They never really attempted to explain where the whole "anime IRL" thing came from, they gave random characters absurdly overly convenient powers and technology to wrap up the story, and they just made a really, REALLY shitty villain.
I honestly was expecting this show to remain brilliant, and I really hope it's the start of a new genre of reverse isekai shows. There were enough things about it that kept the story fairly enjoyable even at the end, and the fantastic characters and interesting premise managed to keep it afloat.
Would I recommend re:creators? Hell yes I would. Would I call it amazing? Definitely not. Like Kado, it started really strong but ultimately failed to do anything with the story and world it created. At the bare minimum at least it ended the story in a somewhat satisfying way, which is more than 90% of anime out there (Such as Kado). It was ultimately a very good show, but the bad writing dragged it down from the masterpiece series it could have been.
