Veneer has fallen off 6 times - was too much tooth removed? (photos)

Asked for Emax or Zirconia veneers as a grinder; use a night guard. Dentist said was better candidate for 360 wrap veneers. Said only small amount of tooth would be removed. Temp canine fell of 3x; now permanent 3x as well. Office ordeirng third cement. Something is not right. So stressed out, not sleeping. Recemented tooth falls off when sleeping. Should this much tooth been removed? Please advise.