The first time I took the test I got over 100 points... then I saw one important line: you are allowed to ignore everything which is normal/not too unusual in the universe/fandom the character lives in. So if you write an X-Men story, you don't get any points for your character being a teenager and having one (!) special power. If your story takes place in a fantasy setting, it's OK when your character is able to use magic and being not human doesn't make him or her a Stu or Sue. She or he even might have purple eyes - if there are others who have purple eyes, too.
I think all of this is about balance: your character shouldn't be younger, stronger, more beautiful, more powerful AND better at everything than all the canon characters. There also should be strengths AND weaknesses. A character who is great at wielding magic could suck at sports. It also would be a good idea to add a flaw or two, like an addiction (drinking, eating, gambling) or phobia.
It is true that those test don't work properly for some fandoms, but if you take the test and ignore everything considered "normal" in the fandom, it might work.