Dear user,
I can understand frustration in your words, but if I sell two different products is because it targets 2 different audiences. If you are OK with managing the server and you don't want to run a large operation then Core license is perfect for your use case. The money you save on licensing is because you don't need the extra on-site assistance. However, you aren't following the debug instructions and I don't blame you. It is clear for me that you have some issues with the language and you just want to get your website fixed and forget all this.
I assume that you got used to a support layer that I won't ever offer again for free. I was used to run and fix issues at any time, weekends, late nights, etc. I'm sorry but that now has a fee, can't do it for free any longer.