At the risk of being too basic, are you aware of the following (not in order of your remarks)?
1. You can 'upswipe' in any orientation to zoom to card view. You never really need the home button, unless you're using an app that isn't coded properly (there aren't many, but 'Quell' comes to mind - and I think it's intentional b/c of the nature of the swiping in the game).
Either way this is worlds more efficient than the attempt at task switching & app management in iOS. I really hope you just need some training help from this community, because this comment seems really far off (left field). No disrespect.
2. I also have an iPad 1, and I don't share your browser opinions in the least. I could not be happier with the addition of flash, and aside from really feature rich pages, I haven't had much struggle at all with the browser. It's absolutely replaced our iPad in that regard.
Lack of tabbed browsing is inconvenient, but not so much as I can fling my finger up once & tap the next page. It's one extra motion, so valid complaint. My understanding is that it may come anyway...whether 3rd party browser or otherwise.
3. Yes, some clicks are unresponsive. I truly hope this is updated in the OTA. That said, I often find myself needing far fewer clicks or motions to get what I need. In that regard webOS is much more efficient than competing platforms (although I have not had any experience with Mango).
4. Apps. I struggle with this. I understand being anxious to have certain services available (Netflix, Words with Friends, etc.). But I don't really see a gaping hole in quality. I don't have Mango to compare to, but iOS, when I go back to it from webOS is an awful experience. Simply navigating the iOS app store, adjusting app settings completely OUTSIDE of the app itself. App closing, switching, etc. It's just plain painful. It's why the iPad has pretty much been replaced for us. We seriously only use it for a few kids apps, netflix every now and then, and Words with Friends.
On the subject of kids. There are a TON of apps on iOS for kids. Some are brilliant. Problem is, I have a 2 & 3 year old. They are crazy saavy with tech now (it's scary). I have some bias, but it's hard to see any bias in a 2 & 3 year old. Despite having more options on iOS to date for kids, my kids always ask for TouchPad now. It's new, but there are also a gazillion flash games that are PERFECT for kids my age. They love them. They also get p*ssed at me if I close an app for them (they want to turn it over, fling themselves, & hear the angry bird).
With iOS, there have been so many times my kids have clicked on almost sinisterly placed banner ads in free aps. It ruins the game for them. And while the 3 year old can hit the home button & open a new app without issue, they have zero idea how to 'app switch', and hit the home button on accident all the time. On the TouchPad, they hit that, or accidentally swipe up...guess what, they still see it on the screen & re-maximize it. I didn't teach that, they figured it out because it was....ding ding ding...intuitive!
Sorry, I'm sure you didn't want my kids rant, but I am really struggling with the massive gap in experience you are noting vs. my own. Everyone is different, so I'm not going to name call, or get ****ed, I have plenty of complaints too. The difference is, I see the value vs. other platforms, and that's what I choose to grandstand. I raise my concerns, but I'm quick to point out where it bests the competition. If that's not the approach, sadly, there won't be a webOS to support. Just saying.
Reduntant & long winded I am...I get some of your post, but the rest is left field. My suggestion is to cozy up to this community & ask people for help. Clearly there are things you are missing. Some very basic operations.