The 737 is an excellent design, even the door plug which blew out. The problem is quality control in the fabrication process of a most excellent aircraft.
In addition the 737 Max was a most excellent aircraft with a bad computer system that caused two crashes.
A friend of mine an ex Air Force Pilot and 737 airline captain now retired explained it to me very simply:
Computer 2
Pilots 0
It should also be noted that both those crashes were third world airlines. First world airlines had also encountered the computer problem and superior pilots coped with it. However, those two pilots in those third world airlines should have never been flying against a rouge computer program. They were inferior pilots. They are also innocent pilots. No where in their training is a chapter that says, today the computer in your aircraft will try to kill you.
What no one is talking about is the WARNINGS that the aircrew received on the pressurization. If we only had the cockpit voice recording… What were the maintenance squawks that were ignored? The aircrew became “heroes” because they saved the plane and passengers. It would be interesting to see the report on what the aircrew did with the warnings they received and previous flight aircrew. We are experiencing the beginning of third world countries with the DEI in the cockpits of our aviation industry. The warnings in that aircraft should have been investigated… but, they weren’t and here we are today.