Google filtering ads?

After a disaster submitting a sitemap having google trash our indexed
pages down to 1 3 months ago but now has grown to a heady grand total
of 13 I have contacted a number of people on the web who run classified
sites and have had similar problems and one common theme runs through
is that most of the googleproblems surround classified sites or
advertising.

Is google now filtering ads to the benifit of their adwords etc? I
suspect this could now be be the truth of why sites have crashed and
not the reasons given that pages are similar being identified by jagger
or s**te like that.

I personally have 250 ads at the moment with virtually no duplicate or
even similar content yet google has only indexed FIVE of them and even
these disappear at leasr ONCE a day. There are 7 pages - help, support,
contact etc etc that have no advertising content yet they always
remain along with the index page.

If google is indeed filtering will they please let us know so we can
start using and promoting other search engines that are more friendly
then we dont have 24/7 365 days a year of hassle by them buggering
about and then blaming webmasters for our problems that dont occurr on
ANY OTHER SEARCH ENGINES some giving by far superior results than
google as far as webmasters and not googlebusiness is concerned.