thearchic,
Yes, yes, a thousand times yes, the noose loosens, or more accurately, there is no noose [except the one you imagine for yourself].
Except your limits.
The advice to accept your limitations is sound, but more important than looking at your weaknesses, appreciate your strengths. I had dozens of ELTs work for me during my six years on the E, and I only considered two (2) to be truly useless to me [and neither of them were retention challenged]. I understand that even both of them are doing fine now that they're out of the Navy.
Your problem right now is that for the last year or so, your only real job [how you contribute and what you feel judged on] has been learning, and you feel weak and tired because it's not your strong point. Well, pretty soon you'll have a real job to do, of which learning is only a small part. You'll be able to finish a day's work and say "I did a good job today." Once you're qualified on your first watchstation and being productive, then you'll have plenty of time to learn your next one, because you'll be busy WORKING. Then, after the Navy, if you don't go into Operations at a power plant, you may not ever have to learn anything ever again [I know plenty of people making six figures working for DOE contractors who have less knowledge than you have right now].
So, relax, take a breath, work hard to learn what you can, keep a good attitude, and you'll do just fine. School and training are artificial environments that have very little to do with real life. When I was a kid, I watched Richover interviewed on "60 Minutes." He said that the happiest day of his life was the day he was finished with the Naval Academy, because it was just a bunch of bunk. Look past the obstacle in front of you and enjoy the fact that life WILL get better.
As far as suicide goes, I knew dudes in college, who had no other responsibilities than to pass basketweaving 101 and have sex with easy girls [and we had a lot of those], who committed suicide. Young adults commit suicide. For that matter, middle-aged adults commit suicide. In comparison, I don't remember anyone who committed suicide during my time on the E. Who would voluntarily want to die as a Navy blueshirt? Would you have to wear patch-pocket, bell-bottom dungarees in Heaven? I shudder at the thought.
Enjoy,
mgm