I'm sorry to hear you feel like that. It's far away from the kind of experience we want to provide for our customers.
I'm not going to argue here, but I just want to underline something. Since purchasing through Envato you get limited time support and since we're not exclusive authors here, we decided to offer alternatives to our customers, so they can choose – extending the support via Envato, or purchasing lifetime license from our shop. There's no scam, or non-ethical issues here at all.
Also, as mentioned at the beginning, once you own a license, you can continue using the theme without problem. You can even update the theme (manually), but you can't get the benefit of our support anymore after the support expires.
However, related to the issue you've been facing — most probably there was a compatibility issue between PixTypes plugin and I could have investigated it further, but you didn't give me the chance.
I hope you found a much better solution for your website and for your needs.