There's no getting around it, you have to do the heavy lifting if you want to improve. Despite occasional sniveling regarding my lack of improvement in OTB chess on these forms, I recently finished 4 repetitions of the 1st 222 tactics exercises in The Woodpecker Method book, taking the time to set up the positions on a physical board each time. After 5 months, the improvement cannot be ignored. I'm now defeating players I used to lose to most of the time and holding on for draws in positions I would normally have lost.
According to authors of The Woodpecker Method, percentage of decisive games decided by tactical mistakes for players over 1800 are over 40%, for those under 1800 that percentage rises to over 72% (see pg. 10 for details)
As I now progress to 4 repetitions of intermediate exercises, the improvement will no doubt continue. (Though my occasional sniveling may appear here in the chess forum! 😏)