Shes just an odd duck mate.
Autos are like lucky dips. Runtz are rare, but, not enough in my opinion. In most cases you get average r above growing in soil. To get the most out of autos. DWC or coco gives the biggest results. + pot size adds a big value to your plants size.
But again. You could have a huge pot. And still get a runt. Its luck of the draw pal. There is things that might have happened.
Also. Its a little early to be putting autos in the ground 7 weeks ago was for fems. Normally you'd only be putting autos in the ground 1-2 weeks so you get the best out sun in July/August.