These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Tekken: Blood Vengeance
Designated Protagonist Syndrome: Xiaoyu and Alisa end up having absolutely nothing to do with the actual conflict of the movie. They're both sent to the school to spy on Shin for their respective companies, but have no effect on the driving plot whatsoever. The movie based on a popular fighting franchise spends almost its entire running time focusing on inane Japanese School Girl drama that goes nowhere and ends up being a complete waste of time. The far more interesting and dynamic conflict between the competing corporations who hired them fighting over Shin for reasons that essentially boil down to an Oedipus Complex is barely mentioned outside of establishing the reason they've both been sent to the boarding school, and even the action filled potential of Cain and Abel siblings Nina and Anna have their climactic final battle that was built up during their subplot throughout the movie happen entirely offscreen! To top it all off, Shin ends up being completely pointless and a waste of time, is disposed of in the most anticlimactic manner possible, and the action fight climax of the movie is focused on Heihachi, Kazuya and Jin, none of which had more than five scenes between them before that moment, and Xiaoyu and Alisa end up sitting there being utterly secondary and ignored until The Stinger.
Ending Fatigue: The end of the movie is divided into three epic battles (Heihachi, Kazuya, and Jin crashing through every floor of Kyoto castle, Devil Kazuya and Devil Jin fighting above the ruins of the castle, and Heihachi tapping into the ancient Mokujin power sealed beneath the castle).
Moral Event Horizon: Crossed by Heihachi with his mostly fatal experimentation on an entire high school class.
Also crossed by Kazuya when he stomps Alisa in half just for the hell of it. Hey, he's more of a monster than Heihachi in the games, so he had to cross the MEH somewhere in the movie.
Narm Charm: Lee's entire existence can be summed up like this. And it is glorious.
So Bad, It's Good: To many fans, the graciousness with which this films twists the Tekken universe around a silly schoolgirl story makes it worth of view despite its many shenanigans.
They Wasted a Perfectly Good Plot: The story with Shin doesn't really go anywhere and at most is just a Red Herring to lead up to the three way fight against the Mishimas, which considering their deep rooted hatred, would probably be less effective than Heihachi just calling the other Mishimas out to fight.
Wangst: Shin's Who Wants to Live Forever? really does come off like this. While it's a valid trope, it's usually done with older characters who have lost loves ones or something. Shin is just really, really emo.