I tend to agree with xxxmx. Your letter is
too long (although I did read the whole thing)... Many years ago I was told by a respected manager that a letter really should not go for any longer than one standard page... (otherwise the reader will lose interest)
I think that you obviously have issues that need to be addressed, but I think you sound very angry in that letter and it becomes long winded as one idea kicks off another issue which then kicks off another one etc....
I would take your letter and try to objectively summarise as much as you can.
or start again. Maybe make a skeleton in point form and expand (not too much) on the points...
eg. Your first paragraph about Management dishonesty... You start talking about the "package" and the fact that it went missing... you really outrightly accuse the manager of "stealing" the package.
(are you sure!? that could be quite inflammatory) all the stuff in between about trying to contact your regional manager and not having one etc.. is really irrelevant to the issue that you are trying to address which is the "honesty". Then you describe what the package was but by that time.. the reader (myself) is a bit confused and it takes a little while to realise that you are talking about the contents of the package..(which is also irrelevant) or could have been mentioned at the beginning..
ie.you could have said...
We found an envelope containing application papers for the Stellar Management programme which had been inadvertantly opened and then subsequently disappeared thereby denying my fellow employee an opportunity to further their skills. (I must say though that I think that it is not your place to discuss another employees career options or lack thereof.. it is their own responsibility)
OMG I am being so longwinded here myself!!!
I will therefore sum up:
Work out the issues that are
most important to you and try to not sound too accusatory.... I would definitely not send the current draft...(JMO)
Good Luck.... I do think that you may be happier if you found another job, from personal experience usually once you are this angry, there is no other solution...
cheers Sammi