I used to take bus from KD to Damansara Uptown last time.

Mine was one of the earliest station so bus came on time, every day. The problem started when the bus reached busy area heading to damansara uptown.

Even the bus stuck together with cars in traffic congestion and this made the bus be late at all the station after, and most people dubbed the bus as unreliable.

The problem is not only the bus. But the whole road system. If the bus functions and drives the same lane like the car, then it defeats the purpose.

the only difference between car and bus is that bus carry more late to work passenger than car.

This. I observed the same problem 10 years ago.

Then you can only tackle those lrt around the neighbourhood.

Good luck try to reach mrt kajang for example, with 2 schools nearby, 1 college, few condos in the vicinity. Lrt subang at the back of subang parade and etc etc. imagine bus also need to brace through usj and the likes. Jam + so many bus stop + so many lrt station. End up people still go back to driving.