Yes? (BTW, you can ask questions on the main site, too. You'll probably get lots of answers that are better than mine, especially when you want a long explanation.)
@Idon'tknowwhoIam. Well, why didn't you say "What about my previous question which I asked, honestly speaking I couldn't get the previous question I asked"?
It's bad writing.
"All people" in the place where everyone should be is also bad writing.
The patterns a) I don't think [blah blah blah] and b) I think [not blah blah blah] (assuming that not is in a right place) are equally correct, but a) is more idiomatic.
Definite articles are honestly one of the few things I don't get how I get right 90% of the time. Maybe it comes with mild fluency in the language, since neither Turkish nor Persian have articles.