Not sure where you are coming from when posting this on an iPad forum. You might be better off posting this on an Android forum. You'll get better(read: more entertaining) answers anyway.
Or get kicked off for trolling (honestly, this would be a trolling thread there even if the OP didn't mean it).
Not sure if the public hates the iPad.
Oh and people enjoy hating on trendy or popular anything, not limited to the iPad.
This is one big reason right here. It's trendy so some people are going to bag on it for that (same reason why even the haters pay attention to Bieber... I mean if they don't care about him so much, why so much focus on him
😉? <- disclaimer, I honestly don't care about Beiber, I just don't see why one would care if other people like him, well except it's cool to bag on the current popular trend to show you aren't a "sheep").
Also, there are some people who are very anti apple on principle (They don't like the closed eco system and feel that it's bad overall for tech so they don't want to see it succeed. Most of these people also are huge Linux fans I find). They like Android cause they see it as the open solution and feel that is the way things should go (and feel the closed eco system will inevitably die when people wake up and realize the closed eco system doesn't allow them to do what they want). Once again, disclaimer, I am not saying I agree, I'm saying that's their POV from what I've seen.
And there are some people who just don't think the iPad is all that (They may in general also not be a fan of tablets. I'd probably fall into this. But we'll see if I change my mind since my mom is handing me down hers, I won't complain about free gadgets
😉. But they also may genuinely prefer the Android tablets for what they offer).
I think most people fall in those catagories but I may have missed some. And of course people being individuals won't fully fall into any of those catagories or some one might have something entirely different.