This is genuinely the first time I've seen people say they hate the remake and with such anger on top of that.
I've only seen it played on video as I do not own a PS5, but I thought it was beautiful looking. Seeing the world on new, 2 gens later hardware, on a new engine, with new lighting and overall graphically upgrade, it made me very close to buying a PS5 (but I'm doing what the bloodborne fans do, and waiting for a PC release. Any day now)
In terms of audio I can't actually remember anything about it, in terms of the music. The audio on enemies, bosses, atmosphere etc all sounded fantastic.
Demon's Souls was the first game I ever imported and it's still my favourite of all the Souls games (Dark Souls 1 being no2). Again, I thought the remake was super impressive looking, so this negativity is kind of a shocker. Or is a defensive mechanism that because a different dev said something about the original that it offended them somehow? That's pretty common too sadly.