why am I getting 6 or less points per match when it used to be hundreds?


Because of the Glicko rating system. When you started off, your rating was very uncertain. The system awarded or subtracted many points until you got to a range where you started winning some games. At that point, the rating was considered more accurate and the points for a win or a loss drop.
Read more about it. https://www.chess.com/article/view/chess-ratings---how-they-work