Most consumers assume things they do not understand are a ripoff. Sometimes they are right. A lot of times they are not.
My aunt's car was leaking a large amount of coolant from around the timing cover, and a fair amount of oil from the oil pan gasket. She was quoted around $1000 to replace the cover gasket, timing chain & sprockets, and the oil pan gasket. I got the car fixed (t-cover gasket only) for $300 and some change via a friend connection. My aunt thought the original quote was a "ripoff." It was not. They quoted her the price to fix everything once and know it was fixed at their normal labor rate (all of this broken down and itemized on the quote). It was a fair price. Anything less, and they would risk a comeback for some other related issue. I explained this to her and she finally understood...the $300 was the cheapest way to patch the car up, and the $1000 was a full on avoid liability, fix all the issues price.
If you are having so many problems, YOU ARE USING SHADY, HACK OUTFITS! Obviously something is wrong with your choice of shop. It's not hard to spot a shady, hack shop. I worked for one for a very short time, and I quit, BECAUSE THEY WERE A SHADY, HACK SHOP! They were cheap, and that's why people went there rather than going places they knew were better. Either you are picking shops for the wrong reasons, not reading reviews, asking around, etc., or you are a difficult, unreasonable customer. Those are the two possible explanations. Believe it or not, most mechanics don't wake up everyday thinking "I'm going to scam antiqueshell." Most want to do a good job. Even here, at a $TEALER$HIP, we have some techs who care WAY more about the cars than the owners do. One guy is an oil filter and Road Force balancing savant. Not all here are as particular about what they do, but none want to rip you off or do poor work. That isn't their goal.
Actually the manufacturing side of things USED to be pretty good with respect to integrity, and competence, but it now too has started to rot from within. Greed is the main culprit.
If I use your line of thought, that is denial and a cop out. You are all just a bunch of shady hacks, selling me junk defective parts, and scamming me.