Specifics would be helpful for the community to provide accurate advice. To echo what others have said, DNN performs very well when setup, maintained and hosted properly. Many of the issues you have described sound like infrastructure or poor execution from your predecessor.

I'd encourage you to understand what DNN should be for your needs vs jumping to the conclusion that DNN is just "terrible".

---

Steven Webster
Manager, Community Platform
F5 Networks, DevCentral

Put another fresh instance of DNN on the server and see how it reacts. If it works fine, you know yours has a problem.

If you're getting all kinds of errors, your setup is probably misconfigured. Depending on how much content and modules you have already, maybe it's better to create a new DNN instance and migrate the content over there. That might be faster than fixing the issues you're having. I wonder if there's a module which can do most of the migration work automatically.