it reminds me of what a pastor of mine called "church hoppers".

There was a family who came to our church and after attending
for a few months started complaining about it. Now they never
offered any solution or offered to help they just complained. After a
while, after hurting a lot of people with their complaints, they left.
Well my pastor knew most of the other pastors in town and through the
grape vine, heard they were doing the same thing at other churches.
She wasn't keeping tabs, but people would just mention it to her,
Well after about a year they were back and the cycle started all
over again, or just continued depending on how you want to look at it.
Well I've been messing with computers for more than thirty years
and it's always been like that. I had a small computer business in a
small town. Almost as soon as I opened my doors people came into my
shop complaining about every other computer business in town. It was
small town so there were about five one man business like mine. They
told me how glad they were that I was there and that they were
switching from the other guy to me because...(list of complaints).
Well it wasn't long till they were complaining about me and switching
to some one else.