Putting is the secret to low scores..
The top guys are all over 60% 1 putt percentage.
I am sitting at 69.10% 1 putt average so if you work it out if I play 10 holes I've made around 7x 1 putts = -7 if I am playing well can be a lot lower.
If I am playing a tournament or RG , & hit a bad shot & looking at 30ft putt I am not trying to roll it close for a tap in par. I would spend 90 sec - 2 mins working the putt out to roll it in.
1 - 10ft can not miss them
11ft - 20ft Are very makeable
30+ find a way to get them in the hole & move to the net hole.
Improve putting & spending time on putting & putting alone will help anyone shot low , but not shot low then bad but be constant with low scores.