Blue patches on Screen

Dear apple, this is the 2nd time I'm having this issue, and 3rd time I'm repairing this. We buy apple because it keep technicians away, and also because we trust apple as a brand. but since few years we don't see anything good. why your gadgets are so faulty. 1st time I lost almost 8000$ worth images because of logic board failed , then I had to replay my display due to the same blue patches. can you please answer these ? I have already spent more than two macbook pro's for this. I'm so dissatisfied with your service.