This episode is really falling flat for me.
You don't like the character so I'm not surprised.
It's not that I don't like the character, it's that I think she's overrated. And in all honesty this is more about episode style than anything. I didn't like the episode where Clark was in a mental hospital either I think two seasons ago.
And, point in fact, there are times I very much like the character. For example, I like it when she calls Clark on his BS and whiny stuff. I kind of hope she finds out he wiped her memory because if she does and has a normal reaction she will be quite pissed that Clark messed with her mind. Not his place to be doing that. That's HER mind an Clark has no busienss messing with it.