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.
Alas, Poor Scrappy: Cole learns his parents have been dead for years, not made better that the one who told him how they died is their murderer, Master Org, who was once their good friend Victor Adler, gloating about his enjoyment from murdering them.
Kite/Animus may have been annoying, but his death scene is legitimately sad, especially since it's his human form that we see die, and unlike his Sentai counterpart, we never see him come back with the other Wild Zords.
Alternate Character Interpretation: Animus can get hit with a heavy dose of this during his arc. Is he just upset that the humans who were supposed to defend the planet are destroying it instead or is he just an environmental terrorist who has the tendencies of a fascist? When Animus revealed that taking away the Rangers' powers was just a test to see how dedicated they are to protecting the Earth, did he really intend for there to be a test, or did he just say that to avoid getting called out by the Rangers?
Anvilicious: The Animus Arc. The series, despite the whole "Orgs were awakened from pollution" part, played the environmental message a bit subtle until this arc. This arc, in particular the last two episodes, lack subtlety with Animus declaring humans should be left to die because they don't treat the Earth with respect.
Jindrax and Toxica, due to being actual likable villains with a believable friendship and sense of camaraderie with each other, and they could also be genuinely funny at times.
Epileptic Trees: Danny Delgado has the same last name as the SPD Yellow Ranger, Z. Since SPD takes place Twenty Minutes into the Future and Z's parents were canonically scientists involved in creating Ranger powers, people think Z might be Danny's daughter.
For Forever Red, Disney and Bandai nixed the original ending of all the Red Rangers' zords destroying Serpentera because they didn't want to show "old toys". Not only did Toei have no problem with doing exactly that with Forever Red's closest counterpart (Gaoranger vs. Super Sentai), they did a second time for Gokaiger's 199 Heroes movie.
Cole is considered one of the most hated rangers ever. His actor would go on to play Deker, a Fan Favorite villain in Samurai, who has a major rivalry with that season's red ranger.
Replacement Scrappy: During the six episodes between Unfinished Business and Forever Red, Mandilok takes over as the Big Bad. Compared to Master Org, Mandilok is basically a flat character whose only goal is to just eat.
Cole, the Rookie Red Ranger who stole the team from Taylor, and became instantly the leader for no reason. He would constantly talk about how he could read a being's "heart," which didn't help the fact that many fans think Wild Force was too preachy.
Also, Princess Shayla, who is basically a really useless Princess who sings.
Kite. A whiny little brat who completely disparages the Rangers' efforts and sacrifices, rants on and on about how humans are bastards, is perfectly willing to abandon them and Shayla to die, hammers in the Green Aesop in the most annoying, tedious and Anvilicious way possible, is of little help when actually needed, and and has an annoying, whiny voice.
Doesn't help that he was Animus (which makes him a scrappy by proxy), who because of his hatred for humanity who even after revealing that him taking the Zords and the rangers' powers away, and him putting Shayla in a coma was a Secret Test of Character, still didn't take back any of the things he said about humanity.
Vindicated by History: Much like Turbo previously, Wild Force has become steadily more popular as the years go on (helped by Linkara saying how he thought it was a good season), especially since we now have twoother seasons that fans like to bash on.
Villain Decay: Remember that HUGE planet-destroying serpent robot that completely dwarfed the other zords and couldn't be fought, only ran away from? Yeah well, now it's about 1/5 of its size, and can be defeated by 1 guy on a flying motorbike. And its planet-destroying laser won't even kill the guy flying inside its mouth. Though to be perfectly fair, this was due to Executive Meddling forcing them to axe a far more impressive Serpentera fight (Which would have had the Red Rangers charge Serpentera all in their own Zords).