I think it just had that ineffable quality of an adaptation where the people making it genuinely did not give a fuck about the source material. The fact that it ostensibly comes from such a great source gives their shitty, poorly thought out decisions an unearned confidence and gravity.

Most of the people watching it will never know that it shat all over all the things that made Wheel of Time great.

The books are slow at times, but everything has a payoff. Robert Jordan was ridiculously meticulous, where every little thing he introduced had a meaning, and more importantly everything followed a consistent set of rules. Like he wouldn't just give a modern Aes Sedai the ability to rendezvous with her lover 400 miles away just to create a sexy side plot. And if he did give her that ability, he'd have done it within the framework of the rules. Like the showrunners could have used that to introduce Tel'aran'rhiod (world of dreams) a little early, probably through the use of a ter'angreal (magical artifact with a specific function). Instead they didn't give a shit.

When it comes right down to it, they just didn't respect their audience. And when a show doesn't respect its audience, it leaves a stink.