I'm sorry, and it's not just you. We are working to get this fixed right now. Could you do me a huge favor and send an example of one of the pictures to
brokenpictures@growweedeasy.com along with the phone/camera model you used? I want to give it to our new programmers as an example of a perfectly good picture that's not uploading. The more examples we have, the better.
As far as posting pictures, in the meantime we've found a lot of people "fix" the problem by resaving the picture, even if you didn't resize it, or taking a screenshot of the picture. I know it's not ideal as you've said, because it should just work without you jumping through hoops

Some growers also upload their pictures to
http://www.imgur.com and link to them from here.
I can understand your frustration because I just got a new phone and now my pictures won't upload either unless I process them! The forum seems to have the most problem with new phones, because apparently they all save their images a little differently from each other. But I promise we are going to get this fixed because we're now paying someone to help us (though I can't guarantee any timeline since it's out of our hands).
When we first made this forum, we had noooooo idea what we were getting into, but everyone is so awesome that we're determined to fix everything one by one, and just improve the mobile experience in general. We are also in the process of getting an app for the forum, to give more browsing options to Android and iPhone users.
I'd just like to add that if anyone ever has any problems with the forum, don't hesitate to PM me. I may not be able to fix it right away, but if you tell me I can report problems so we can get them fixed by a programmer!