why do so many people hate the shandy(shadowXsandy)pareing?

Well if you mean Sandy as in the girl from Spongebob. [You don't actually explain who 'Sandy' is so I'm going to guess it's her since that's what pops up in google when I type in Shadow x Sandy.]

I don't bash most ships [I will say most not all because there are some I just can't help but question and sometimes attack without meaning to. Shadow x Shriek is one of those situations]. I don't support it because it really to me is a clashing pair. From what little I know about Sandy, as I'm not a fan of the show she's on, her personality seems to clash with Shadow's and just not fit so well. If they were a couple I picture it'd be a one sided a fare with Sandy's side the one in love.

I'll also like to add I don't understand why people can only 'ship' a character with only one person and I'm not a shipper of Shadow and Rouge myself.

"Whoa whoa whoa, calm down. Who's this Sandy, a fan character of yours? And why're you so ticked off over somethign so trivial?"

Sandy is from Spongebob. Shadow doesn't even like Rouge, he loves Maria.

The personnality doesn't match...And the animal are not compatible(Hedgehog and a squirrel,just WTF...)
This is just so disgusting and stupid...

Uh well to be honest I never really thought about this couple but I don't know how i would feel if that happened. I would most likely disagree but I wouldn't say I would try and break them up. I mean if Shadow and Sandy love each other than I don't have the right to take away their friendship. Even though i'm not saying I support it cause I don't.