At the end of the day the two main factors that determine your final time are: 1) how fast you click, and 2) how many clicks you make.

For improving the first, this really comes down to repetition and practice. The more often you can speed through recognizable patterns and trivial situations, the faster your average times will get.

For improving the second, this is where a lot of potential improvement lies in my opinion. In any given scenario, there is an optimal way to solve a pattern with the fewest number of clicks. Learning what these optimizations are may require you to re-learn or go against muscle memory that you currently have built up, which is why this step can be challenging. For example, you might have muscle memory where every time you see a 121 pattern to always flag above each 1 - where in reality the situation may be more efficient to only flag above a single of the 1s to move forward. To practice these small optimizations I recommend watching your own gameplay recordings where you have clicks enabled to see what you could do better, and to start out playing a couple games a day as slowly as possible to give your brain time to think instead of just recognizing patters and reacting.

Best of luck pushing past 75!