Inspiron 5591 2-in-1, broken hinges (x3)

I bought three Inspiron 5591 2-in-1 laptops with the flip screen. I had to send 2 back immediately since the webcam was non-functional, so lost 3 weeks for the depot to replace the display.

Used all three very lightly, maybe flipped the screens fully a dozen times per design and opened/closed the screens like a normal laptop about 7-10 times per week. We're talking less than 300 total open/close lid events in the first 6 months of use for each laptop. No abuse, just regular usage. 

8 months later (two of the in the same week), all three are starting to shows signs of cracking the bezel and LCD display at the bottom right hinge. I called Tech support to report this flaw and seek help. I was DENIED! They told me this was obviously customer caused damage and they would be happy to help at my expense (at least $300 each). That is almost half the value of each laptop. I would understand and agree if this was the result of mishandling, but certainly not the case here.  

Seriously, in my opinion this is a design flaw so why am I on the hook to pay for it? Very disappointed in Dell. I'm out over $1,900 for laptops that cannot be used as laptops anymore. The Basic warranty should cover this and I was told as much when I spoke to the Customer Sales rep. So misleading. I also tried multiple calls to service managers but no one will offer any assistance. I've been a long time user of Dell from residential to Enterprise class systems. 

So this is my last ditch effort for help. Anyone have suggestions for working with Dell to get this issue resolved to some degree of satisfaction?  Or have suggestions on how to open the display and chassis to loosen and adjust the screen hinges? Obviously Dell warranties don't matter anymore, so I'm willing to do the work myself.

Or am I the only one having problems with these 2-in-1 laptops?