Keep in mind that progress can be slow in coming at times. Practice is all about developing the confidence and trust in your ability with the new skill before you take it to the competitive arena. I understand your frustration with not seeing the improvements when you want to see them. When progress is slow you can choose to reframe your thought process and focus on the progress in other areas.
Working smarter does not mean working harder. It simply means practicing on the areas of your game you wish to improve requires a plan with specific objectives. It's not about the quantity of the work you do, but the quality of the work on the specific task areas of the skill needing refinement.
Focus on what is absolutely critical to ...