"we have owned 6 GM cars and now 3 have been bought back by GM"
I've owned plenty of cars and none have had that many problems and you had 3 that had to be returned. Something is fishy here. In your world you have/had a 50/50 chance of getting a lemon with a GM.
I think the GM products that are the subject of this forum are well engineered, attractive and purposeful vehicles. The negatives of buffeting, buyback posts etc. is distracting and very well could be an attempt by disingenuous entities to smear the brand and potential resale.
Buybacks, lemon discussion and similar should have their own forum. I participate on a number of forums out there and the amount of shill advertising is both increasing and creative.