I figured it was stunted without seeing a photo. But now you’ve posted a photo, I agree, what you have there is actually kind of amazing. I’ve also never seen anything like that because it looks incredibly healthy.
For reference my nuggets is close to 5’ tall.
You didn’t make a mistake by not topping though, you don’t need to top to perform LST. Not even sure if LST caused your issue. Could be a freak thing. But if you feel like a majority of your plants are getting stunted, maybe hold back a bit and let the plant tell you what it wants. Versus trying to make it do what you want. Or not. It’s all up to you.