I got to read you post kusojiji before it was removed...if you don't mind, I'll frame it so it is on topic:
Q: "Is it considered bad manners to brag about being 'better than average' with chopstick proficiency?"
Answer: Only if you do so without a sense of humor about it.
Yes, there are plastic hashi. also there are 'training' hashi for kids, thay have a hinge between the two making it much easier for little hands to manage.