I hear you brother and there is blame to share but LM does NOT deserve all the blame.
As noted, requirements creep and an unrelenting desire to purchase a single airframe for all services that forced multiple comprises, usually without coordination within the service let alone with other services. As an example I was in the five sided funny palace when they discovered the F-35 datalink was incompatible with the F-22 datalink...YGBSM...built by the same company! And for the record, that company tried repeatedly to tell the government it was an issue but got the hand waive from DoD until suddenly it was a crisis.
Fat Amy will always get a bad name but behind the green door she is a bad bitch in her mission area. Post merge she is the chick you don't want your friends to see you with, especially when the bar closes and the lights come on. Behind closed doors and pre-merge she will rock your world (sts) like a MILF nymphomaniac who spent time in Thailand. I truly hope everyone continues to underestimate her. For all her incredible capabilities on the classified side, they made huge sacrifices to make a VTOL version. They made even more sacrifices to get the naval variant on the boat while meeting the range requirements...as a result it doesn't even have a gun...didn't we learn that less 50 years ago in Vietnam? Many of the issues are software related and driven by DoD that does not understand AGILE software development. The history of the sausage making behind the scenes is boring yet maddening, the government made it SOOO much harder (sts).
Similarly look at the V-22...the Marines ran the program and controlled all the key design and performance requirements which led to many of today's issues. As an example, the rotor disc is not aerodynamically optimized, the diameter should be about 20% larger but it would not fit on the boat so out of the gate a huge sacrifice in performance that impacted every service that flies it. I am certainly not a test pilot but have been told the performance issues like Vortex Ring State are made worse by the reduced optimization of the rotor diameter.
All is not doom and gloom, especially with Fat Amy. In reality in most circumstances if a peer or near peer gets to the merge with an F-35....even if the F-35 is flown by a mediocre pilot, something went very wrong. Not saying things don't go wrong, but she is not incapable.