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.
God-Mode Sue - Mushra is the reincarnation of an actual galaxial god, and guess what form he returns to at the end of the series? It's even called God Mushra in the original version.
Mary Sue: Mushrambo, he's extremely broken in his first appearance, with further alterations making him even more overpowered and finally made into the Big Bad of the first part of the series.
Narm - When becoming Mushrambo for the first time, Mushra absorbs his friends' cards... through his chest. It almost killed the Moment of Awesome.
Purity Sue - Not so much in the original, but the dub will go on and on about how Yakumo's so loving and the embodiment of love and how her love will illuminate the world, blablabla. We know she's great, people, but *please*...
Squick - The Saban dub, particularly towards the end, likes to imply that Yakumo and Mushrambo are destined lovers. Mushrambo is either three people at once : a kid, a teen and a fat anthropomorphic cat merged together, or the guy who wiped out the human race and tried to kill her. She also has the sexual and romantic experience of a six year old.
The Scrappy - Poor Yakumo seems rather hated by those who met her through the English dub. Also Binka sometimes as well.
The Enterrans in general, several of the different mini arcs were very rushed, making the possibilities of animal Enterrans very limited.
They Wasted a Perfectly Good Plot: The story seems to be rushed, especially during the Bird type Enterran and Kardians arcs, several would be important characters are unceremoniously killed and several element seem to be Ass Pull types especially Mushra's true nature as a Celestial Guardian without any hint of it previously.