All the stuff has been extensively discusses here. First, I had severall efforts to try to get answers on the subject at hand, several topics. Second, I myself participated in several discussions about the problems of the Nextcloud System for endusers - I also scolded several users, who complained about lack of support and pointed out the very things, you point out.
However, in the end, the problems I described with Nextcloud do remain and they do seem to stick with me and several other users here. It is probably time to think about solutions for people like me, if you want to really improve the nextcloud experience and the nextcloud installed base.
@JimmyKater: as mentioned on several occasions, I am ready any time to pay for end user support as long as it makes sense - eg it doesnt make sense to pay more for Nextcloud support then you pay for a whole professional dropbox account. I have allready advocated for a paying option to get support for less technical savy end users like me, So i am glad to take you up on your offer!
@JasonBayton: if you own a BMW, and your BMW doesnt start and you are trying to reach somebody at BMW to ask about it - their business wont live to long if the always answer “We dont know what to do, dont complain” - they will at least direct you to a location, where you can get it fixed and provide all the necessary information and professional training to get it fixed, no matter what streets you are driving on and who the passengers are. Sure, the difference is, a car costs up front, that money goes to BMW. But the interest of spreading the own product and support is quite the same here. Furthermore, I quite often found that digging deeper into technical issues, all smart options quickly fade and people stop to answer or a solution couldnt be found.
In the end it all boilds down to the question, where Nextcloud wants to go: stay where it is and maybe be something for specialized users or start becoming a very big thing.
And rigt now, I think that - being a defender of nextcloud - i am growing increasingly frustrated over the same problems for 1-2 years now and so are many, many more people, some of whom wrote here and many more dont write.