Any student who is chopped (or has been in recent years) was given every possible chance to succeed. The system is now SO student friendly (rightly so) and TG et al are paranoid about having a water-tight case that each student is given umpteen extra hrs/sorties before the axe finally falls.
As someone else said, I don't regret any of my decisions to swing the axe, but I do feel sorry as it falls. Such is life.
I know people who would make cr@p aircrew who are very successful in other areas of life - it's all about finding out what you can and can't do.
Fact: some people make crap aircrew, some are good. To want to fly doesn't mean you have a divine right to, it takes hard work and a certain skill-set.