Welcome to the forum :flower:
Sorry you are having so much trouble
most playback issue can be related to the following...
1.) Low to poor quality media used for the backup, solution-> use either Taiyo Yuden or Verbatim brand media.
2.) Burning to fast, solution-> burn at half the rated speed of the media being used.
3.) Some standalone DVD players don't support the +R media, solution-> set booktype to DVD-Rom.
However some members have trouble with the built-in burn engine used by DVDFab which the best solution in this case is to set DVDFab to use ImgBurn as the burn engine...please see guide below in my signature.