Yeah, using a track pad is probably harder to use for most people; it seems like using a mouse would be more fluid and natural. However, if it works for you than you shouldn't change your style~
At the same time however, after 6 months of consistent play and a playcount of more than 10,000, I would expect your rank to be better. to be blunt, a rank of #42,354 is hardly considered "pro". So perhaps a track pad is preventing you from getting better. In the end, it's up to you, but if I were you, I would consider playing with a mouse or getting a tablet.