It's a lot more rewarding to come up with it yourself. Just start trying different numbers until you find something you like. 👍
That has never worked for me; usually I only manage to make a car worse as I tune it..
For me if there is a great one out there, why would I spend my time trying to re-create that great one by experimenting, I just use that one. Now if there aren't any tunes then ya of course I'd experiment to get the best tune.
In that case, do the opposite of what you've been doing and maybe that will work.
I learned how to tune by using extremes. Drift with -10 camber for a minute, then drift with 0. Drift with a 5/5/5 LSD and then with a 60/60/60. Soon you will learn what does what and gradually come up with a style that works best for you.
Most people are just lazy and don't want to put in the effort.