does it hurt your car if you punch the accelerator

maybe you should check your clutch springs they might need to be replaced

It's not likely to get better until you bleed it. When it got low, air entered the system.Now it's trapped in the system. When you apply the pedal, the air will compress some where fluid won't, so less "work" is being done. When bleeding it, have someone depress the pedal ONE time and hold it down while the bleeder screw is opened (Do NOT pump it) . Then, while pedal is still down, close the screw. Keep the level in the reservoir up all during the bleeding process or you will introduce more air. You may have to repeat the above steps as many as 30 to 50 times before you get good clutch action, so be patient and just perservere. The S-10 clutch is often a bear to get bled.

Not if you don't mean it.