No politician (or newspaper editor for that matter) has time to read such a rambling letter. You need to focus on one issue and be very clear about what you want the person you are writing to to do for you.
I'm not sure you even ask him to investigate? Perhaps it's in there somewhere but (like a politician) I didn't have time or inclination to read it all, just the first and last few paragraphs.
In the UK I found it best to write to my MP asking them to pose a specific question to the department concerned. They did so and I had my answer back via my MP in about two weeks.
The point being that _all_ my MP had to do was pass on my question. He didn't have to wade through pages of stuff he had no interest in and that wasn't going to get him any votes.