I have been using NextCloud since a couple of months, and it is great in many ways, but compared to other sync tools I have used during the years I must say I am not very happy with the NextCloud desktop sync application. I have now switchet to the OwnCloud desktop sync, and it works geat, but most important, it is not so confusing as the NextCloud client. I always had a feeling that i was not in control of the sync-process. I rally think the sync-client needs improvement.
Hello @prl,
welcome to the Nextcloud community! 
Your post reads generally and non-specifically.
Where exactly do you have problems?
Hello @prl, can you please elaborate on how we could improve the experience for you? This feedback is too vague to work with. Thank you!
Just a few remarks here:
The progressing log is massive, skipping the sucesfull lines (optional) would help
An error occuring during sync, will be repeated every sync-cycle. Please make skip-list of those files