I think that your writing is not that poor. You only have to practise more. And I think that you are already doing that when you wrote to us.
However, I think that your writing is rather influenced by your first language.
A structure like 'I really appreciate to you this help' is a translation of the equivalent in Arabic. Thus the to you here is a result of what we call liguistic interference. A good way to avoid these interferences in the future is to do a lot of reading and try to think in English when writing in English.