I rarely make garments anymore. in recent years when i was helping my girls i was surpised at how little info is printed on the tissue now.
I help with our local 4H clinics and feel bad for the beginners. even the Easy patterns have so little information/instructions the kids struggle. I would have to say the majority of the mistakes we see, it's due to unclear instructions. the kids say "i did exactly what it said" and they have, but the instructions are so vague if you don't have the knowledge beforehand, you're lost.