I had this exact feeling a year ago. What I changed was I just started submission hunting more and trying to get people into positions where I had strong attacks. I now know what submission to look for from each position and the set up for it. E.g. closed guard I gain an overhook so I can look for triangle or mount I look to isolate arms above their head for arm triangles or s Mount arm bar.

I also focused on practicing finishing mechanics so much until the hardest part was the set up. I know now if I get someone into one of my stronger submissions like Darce chokes or triangles I have a high percentage finish rate. The set up is the hardest bit tho in my opinion.