i don’t think you have softened mentally. i think your focus has changed and you have developed a new set of mental skills. kind of the way that the development of strength and metcon compete with each other in the physical domain, the challenge of remaining calm and focused in the face of a potentially crushing situation (o-lifting) and pushing yourself past the pain (cf) compete with each other in the mental domain.  they are two different sets of mental skills.

most sports can be broken into one of two categories: skill or effort.  performance in gymnastics is almost entirely reliant on skill. performance in running/powerlifting is mainly effort–who wants it more on a given day. a few sports blend the two–o-lifting, wrestling come to mind.  cf is also a blend but once you have the stable of basic skills under your belt (of which o-lifting is probably the most complex), it is basically who can and will suck it up and deal with the most pain.  that was especially noticable at the games this past year.

personally, i think there is enough stuff in life that we just have to “deal with” and “get through” and a workout/situation that mimics that does not build mental toughness, it is just a beat down (my opinion).  sometimes you might need to do it just to prove to yourself that you can, but generally…not so much.  on the other hand i see real value in establishing the mental qualities of consistency, equanimity, relaxed focused and skillful conduct in the face of huge odds and intimidating tasks that oly’s and other skill related endeavor’s require.  the question becomes not “can you try harder?”, but ”can you behave well/perform complex tasks under intense pressure?”  so bottom line is, i don’t see your issue as a lack of toughness, i see it as a change of focus and an enhanced set of mental skills in a new arena.  if you have lost some “toughness”, is that really a bad thing in light of what you have gained in other areas? is that a trade off you are willing to make?

Side not:
I wrote this before my current injury but i think it still has tons of value, so enjoy and spend a bit of time reflecting on yourself and your training.