No, he wasn't that good-looking. Cute yes, but a lot of kids are cute, even those who grow looking like trailer-trash.
That's what lots of drugs and booze does.
Must be meth.
Such a shame. He was a cute kid; he had another good role after T2 in American Heart with Jeff Bridges. I guess he went off the rails after that.
There must be some kind of Terminator curse -- Linda Hamilton looks like death warmed over these days too, and the actor who replaced Furlong in T3 because Furlong was too messed up has also been in and out of rehab and looks like shit.
As for Schwarzenegger, well...