I totally agree with you. Well, we had some downs and we believe we have resolved all those issues and now we are back on track. Please allow us little more time to make the support system smoother. The most prioritise thing we are doing right now is to focusing on the quality of our products and Page Builder 5.0 is a result of that. Well, page builder has different data structure which for some cacses created some issues for some users but we are identifying the issues and adding possible solutions but sometimes on some cases it's little hard.
However, for any kind of new installation, you will havce amazin gexperience. But, it's all about custom addons and legacy structure. But, with the every new release, we are trying to identify and add more solid backward compatibility support so that users don't have to adjust the content of their website's pages.
Now, regarding the font, I have tested that the font family you mentioned in nowhere hardcoded in the template scss or css file. You might check on the typography section of Helix Ultimate Framework. From there you might disable and use the desired font you want.
If it's still does not work we will look for other possible solutions.
Thank you