I don’t know much about the data, so it is very hard to guess. What type of data do you use (sensor) and how large is your area? The number of PS candidates seems quite large to me.
Also witdth = 1 and number of interferograms = 0 is very strange.
Have you seen this documentation? https://gitlab.com/Rexthor/gis-blog/blob/master/StaMPS/2_stamps_workflow.md