Jesus, this thread again? Kopipe time.
Yukari is still pretty popular among most of us, the problem comes more from fans hyping up her strength and making her out to be the mother fucking Flash of Touhou; able to achieve anything with her poorly defined powers and ought to be able to defeat anyone.
It ignores a key part of Yukari Yakumo, she's a schemer. A direct show of force simply isn't Yukari's style, it never had been and never will be. Sure it's fun for doujin artists like Chado to draw up a massive DBZ style fight, or for neck beards to argue about her capabilities, but the thing that makes Yukari so attractive as a character in the first place is her evasive twisted nature. Nothing she does is what it seems, schemes within schemes Yukari plots on the very long term in ways only a few could begin to comprehend.
For a true powerhouse character with combat ability, you need to look to youkai like Suika and Yuka, Yuka especially because of her direct nature. For a powerful but direct mastermind you've got Kanako who is clearly working towards her own agenda but it's not exactly hidden. In comparison Yukari's methods are convoluted to the point where it borders (oh ho) on insanity, she approaches problems from completely unexpected angles obfuscating her objectives with both clear and hidden feints.
The point is, when someone fights Yukari, she is never really serious, often smiling as she laughs off a defeat and retreats having spun the circumstances to her favour. Yukari has never been a direct force kind of youkai. She is a schemer by nature and her powers only support this.