Dell Pathetic/*********** support online service. Is it time to move to another brand?

Im writing this after 2 weeks of back and fourth with Dell. After submitted a repair request service online, Dell sent a technician to do the repair. He then asks me to meet him at Mcdonalds as he does not feel comfortable to meet in our area, which i agree to. He then replaces the motherboard of the computer (which takes about 10 minutes), but does not test it, to see if there is power on the computer. He then closes the case with Dell as resolved. I get home and test it, only to find that the computer is completely dead. I contact Dell and up until today im still waiting to get it repaired.