@ElderAve
I hear ya!
I will never forgive the dental industry for doing unnecessary work to make more money (back in the 1970s and early 80s,) leaving a whole load of people who are 50-62-ish now, with a mouthful of mercury and amalgam, (and some with 22-23 teeth or less, and half of them filled!!!)
In addition, I am also sick of the telling off I have always had from every dentist I have ever had, for 'not looking after my teeth properly.'
Well ya know what... if it wasn't for you feckers drilling and filling and extracting teeth for cash when my generation were young, my teeth would be better. (And also, they aren't THAT bad, not for a woman in her mid 50s!)
I swear to GOD that my teeth would be better if I had never been to a dentist. I mean they are OK, but not brilliant. I am not afraid to smile, but on a scale of 1-10, they are a 5. DH's are the same. Pretty OK, but not brilliant, and like me, he has most of the back ones filled.
My DC and their friends are a 10. Beautiful teeth all of them.
When my DC were young (late 90s/early noughties.) and I used to take them to the dentist, one particular dentist used to say how lovely their teeth were, and 'they are soooo much better than your mum and dad's teeth!.' He also said 'keep looking after them so you don't end up with teeth like your parents.' 
My DD said to him after about the 4th or 5th time he had said something like this 'my mum's teeth are fine! Why are you saying that?' I was so impressed that she stuck up for me. I just felt awkward and embarrassed and never said anything. 
He just laughed and changed the subject. After that, my DD said she no longer wanted to go to him. So we went on another dentists list and moved 6-8 months later... And as I said, my teeth aren't awful, and my smile is OK, but the teeth at the back are all filled and/or crowned. 
Anyway, some years later I registered with a lovely new dentist (in 2015) when we moved areas, and was allocated a lovely lady in her 30s. She has perfect teeth and yet has never ever gone on at me about mine. She is lovely, and says my teeth are OK, and doesn't slag me off. Same with DH. He said she is the best dentist he has ever been to.
Oh and like @managedmis I ALSO get sick of the hairdresser having a go at me... I lighten my own hair (not paying £70 a time when I can do it for £5,) and when I go for a cut, I keep getting told I NEED to have it lightened professionally. Oddly it looks just the same as THEIR colour! They NEED my £70 every 6 weeks more like!!! 