car seats are meant to position the driver so the driver doesnt go to sleep. e.g. lets take my mercedes benz seats - they are not soft in any way, they have a spring chassis though - But they are nicely contoured so you can sit in it all day long.
OTOH, my chevy has soft seats - sofa soft but terrible back design - good thing its a bench seat at the front.
it seems that you are not liking the contouring of the toyota seats rather than softness - and I agree with you 100%, toyota has not made good seats since the 90s, even in the crown, markx, mark2, land cruiser etc - all of them are completely useless when it comes to comfort.
The website below are who make the seats you find in Pakistani cars
click
they also have sports car seats- but they are not sold in Pakistan anywhere.