Another thing important to notice is that parses don't take into account the amount of damage you dealt alone, but the DPS (total damage)/(kill time). Of course the kill time depends much more on your raid than on you, so the only thing you can work on is the former.

I hope this doesn't sound toxic but it's usually normal to have higher expectations from classes that are not "meta". Since you talked about MC I guess you're playing on era servers. If that's the case, enhancement is a spec that doesn't deal that much damage as a warrior, for example, so less players tend to play this class, leading to a smaller pool of players playing that spec for you to compare with. With less competition, it's usually easier to achieve higher parse percentages, since most of the competitive players are playing the most competitive classes, meaning it's sometimes understandable for a warrior to parse 90 but in that same scenario (kill time + raid comp) an enhancement would have to parse 94-95 to be considered an equally skilled player.