Dell's Quality Control is awful-if exsists at all!

My Dell Inspiron Laptop motherboard dies after 6 months. So it went back to the factory, only to get it back and it runs for one minute then shuts down. Sounds like a heat sync to me, However, their tech depart has to give permission to return it again....kept me on the phone for 5 hours of trying and I had to DEMAND he stop and give me the box to return it to Dell. 5 HOURS!!! Not only that, but he did a DESTRUCTIVE REFORMAT in a round about way like he didn't want me to know, and I lost all my data. My friends told me I should have bought an HP and now I believe them! SO what was supposed to be a quick 7 day repair now turns into 3 weeks!