There's nothing wrong with Ubuntu. If you want to got back to Windows, then fine, but don't **** Ubuntu off to try and justify your decision.
I find comments like this also don't help. The comments made only serve to put the windows users off more. Unfortunately, amongst many windows users, they see the linux communities as a little unfriendly/unhelpful. This is not the case, however it almost sounds fanboy-ish the comments flying back and forth from both sets of users. I think it's seen as arrogance.
I'm a very experienced Windows user and have, over the past few years, tried to dabble (initially rather unsuccesfully) in Linux flavours. However, that has not made me give up as sometimes Windows just isn't right for the task e.g. networking! I can't believe this area hasn't been properly addressed compared with linux where networking works so well (sorry, I've not gone into details but generally shares etc work better on linux, with windows being a little inconsistent).
People have unfortunately become lazy (myself included) with the fancy GUI's MS have been feeding us. We like our computers to just work. With MS, that is just the case, though oddly enough, this is because it is so well supported by manufacturers. It's like a catch-22. You cannot say this is always the case with linux. I take wireless cards as an example. The newbie user doesn't want to have to go command line to get it working, if at all. This is not the fault of the distro, as mentioned above, but does not detract from the fact that it makes life a little harder when we just want it to work.
On a side note, I actually don't like ubuntu. I tried working with both it and kubuntu but I prefer CentOS for some reason (even though I'm a desktop user). Not sure why but I just prefer it.