Compared to other "large" cities in the US, our system is no where near them. Yes a large contributing factor is suburbs, but also how far out those suburbs are. OP lives in Plano, not in Dallas.
have you been to many other large cities in the US and tried their mass transit systems? granted NYC, DC, and Chicago are better especially with their rail system. but you will not find a better system in the south or western united states. the busses are on time, very clean, bicycle friendly, and over 90% of the city is with in a 10 min walk of a bus stop.