Should my past dentist be responsible for present teeth issues? 2 yrs ago I had 3 crowns, a root canal, and fillings.

I have had 2 teeth pulled recently due to fillings. I have an abscess crown with decay at gum line that is now unsavable as well and appt set for extraction. It is actually the worse pain that I've ever had where my teeth are concerned. The front crown which I had done due to 10 yrs ago a bad car wreck deadened the tooth and had a root canal done then. It had started to discolor and chipped so I had crown placed. Every since this crown, I've had off and on pain and a blood pocket above tooth?

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