Making quality posts should not be expected from the beginners, as they are just starting their journey as a newbie but as time goes by we might see the improvement from their post as they gain more experienced day by day. Quality posts are those usually received merits, and those can make quality posts are those who can be considered as a knowledgeable member.
This is not possible, I don't think that there is a forum that can maintain their content perfectly, there are some who commonly misspelled words, grammatical errors, and many more.