Sorry to jump in with another "me too" but, me too. The top inch of steamed milk is completely porcelain-smooth bubble-free micro foam, everything else is hot milk. I have a 4.5L boiler in my 1-group Brasilia and a 12L boiler in my 2-group Laranzato so it's not a boiler size issue.
Since I've been struggling with this for a few years, I've picked up a few '
tips', hilarious pun intended.
1.) I do better with smaller pitchers (8-12oz) 1/3 to 1/2 full (or empty, depending on your life outlook)
2.) I do better with tips that have holes that point out at about a 45 degree angle as opposed to ones that point mostly downward.
3.) I do better with smaller-holed tips.
If you haven't tried different steam tips, I suggest you do. It may not work for everyone, but a different tip may better suit your steaming style.