I've just checked the mobile version and completely agree with the OP.
After you aim you drag back to your proposed putting strength then let go. A line appears that shows where the ball roll and where it will stop. If your a bit left or right simply adjust your aim and putt.
I did 4 putts 2 of which I had to adjust and dropped all 4.
Now I don't play the mobile version except for daily XP when I'm away from computer and then only in practice mode but if it's available in ranked rounds it's ludicrous and has no place in a serious golf sim.