I've seen a lot of thread talking about springs and everything, and my suspension is ****ing stiff, and is very low*. And it's like that since I've bought the car 2 years ago.. is there any way to check if it's "special" spings or anything? or I need new shocks/struts/springs?
Sounds like you probably have a set of lowering springs on the car. You might find something by pulling the wheels off and looking at the springs. Note the color and look for any brand names stamped on or part numbers, and look at the ends to see if they have been cut off.
Bad shocks or struts will cause the car to bounce, but won't really cause a stiff ride.