Nope. They're hard but will get softer as the seat cushion wears out. Then you'll feel the upholstery wire in your thigh. Then you'll either get another car or replace the cushion and have a hard supportive one again like I did.
You can try a cushioned seat cover. That will help somewhat.
Sadly cheap cars use cheaper materials. We like ours but a 77,000 miles it is definitely getting tiring to sit in. Mostly for short trips now. My daughter's 2010 with about 160,000 on it is like sitting on a park bench.