I know this isn't really an enneagram focused board (but I can't handle the layout of the enneagram institute discussion board), but from the comments I've read generally, 3s are seen as pretty unpalatable human beings.
Reading the 'who is your enneagram dual' thread, 7s and 8s seemed to very popular types. 4s, 6s, 9s and 2s also get a look in. Then, of course, the board explodes into another Phaedrus-duel-to-the-death and everything goes a bit off course. 1s are also pretty unpopular, but since I'm not a 1 and am a 3, I thought I'd focus the thread on something I cared more about.
What makes you dislike (if hate is too strong) the E3?
Is it their emotional disconnect? Their ruthless self-obsession? Their narcissistic tendencies? I'm curious. And maybe I'll be a 'typical' 3, revel in negative feedback, hurt, and then use it to refine my self-image (or my image, or my self, or whatever). I actually have some problems reconciling being an IEE and a 3w4 sometimes, but I'm so certain I'm both. Do 3s somehow seem less than human? Less authentic, more robotic and thus sub-human/in-human? I sometimes get that impression...