Even though critics weren’t kind and audiences seemed uninterested, the film isn't quite as bad as people claim, and it managed to bring a sense of closure to the series. After three engaging movies, continuing the “Karate Kid” story felt almost inevitable, so a fourth installment was made, featuring a young female student instead of the familiar apprentice (Ralph Macchio had grown too old for the role and wasn't keen on further involvement in martial arts films). It was a gamble, but necessary to keep the franchise alive... though audiences didn’t respond as hoped, despite the movie not being as terrible as its reputation suggests. I actually found it to be better than the film that came right before it. The box office performance suffered, mainly due to waning public enthusiasm for karate films, effectively ending the series for several decades. Still, I believe it concluded things on a positive note. The story is straightforward, though not without its shortcomings: Miyagi attends a military ceremony honoring fallen soldiers and meets Julie, the daughter of an old comrade. She's a troubled young woman struggling with anger and grief following the loss of her parents. He decides to take her on as a student, it quickly becoming apparent that she’ll need martial arts skills to defend herself against aggressive peers. Predictability is definitely a factor throughout, not adding much fresh perspective to the franchise; the film largely reuses familiar ideas and structures. The ending felt somewhat unbelievable. Despite these issues, Pat Morita returns, having already won us over with his character's warmth and humor, delivering a consistently strong performance. He’s always been crucial to the success of these films, and his funny and charming presence is even more vital here, as he takes on an expanded role. Hillary Swank was very young at the time and hadn’t yet reached her peak, but she displayed charisma, stage presence, and a raw talent that needed refining. Michael Ironside and Michael Cavalieri also appear as the two main antagonists, who are predictable, one-dimensional, and underdeveloped, though still deserving of dislike. From a technical standpoint, it's a low-key production, prioritizing clear sound and visuals over flashy effects. The film’s pace is slower than previous installments, which diminishes some of the excitement and makes it feel somewhat sluggish, but it isn't a major issue. The cinematography and editing are adequate, as are the locations, set design (particularly the monastery), and costumes. Importantly, the action sequences were well-executed and nicely choreographed; while some felt they were too infrequent, I found them more compelling than those in the two preceding films.

Source on TMDB