No female lead, no brainless characters, no power fantasy, no System, slow-paced.
Just an ordinary cultivation fantasy novel, perhaps.
If you want to read it, give it a try. There isn't much to say in the blurb, so here are a few points.
The protagonist has no romantic interest.
The male lead is a little foolish at first, but he's definitely not brainless, nor is he the type to act all smug.
The villains definitely have brains.
In particular, most sect leaders and chiefs are smart people.
You won't find a situation where the leader of a huge sect acts like a child.
This book moves slowly. You'll see what I mean when you read it. That's all, so if you're interested, turn the page.