if you take a break you wont be better immediately after you start playing, you may need to have a couple warm up sessions, and slowly like that your peak sessions will become better than the old ones, but you need to understand that you wont always be at peak
even then, if you just keep playing and practicing even your bad sessions will be better than your old bad sessions, so you just need patience
though to clarify, its not just bad and good sessions, some days you may perform at your 70%, some at your 50 or 30%, so just because you couldnt beat an old score by a bit doesnt mean you havent improved, just means maybe your current 60% is almost as good as your old 80%