Instead of admiring your chair for its tacky appearance, you should know the proper way to sit on it. Pull it as close as possible to the desk and make sure that your upper arms are parallel to your spine. Then rest both hands on the desk. If the angle of your elbows is not 90-degrees, then you need to adjust the chair height.
After adjusting your chair you now need to check if you can slide your fingers under your thigh from the edges of the chair. If it is tight, you need to prop your feet up with a footrest.
Remember you need to have your bottom pressed against the back of your chair. It is probably wise to use a cushion to arch your lower back. This will prevent you from slumping forward as you tire up. This support by the cushion is crucial in minimising the strain on your back.
To reduce neck strain you need to adjust your seat so that your gaze is aimed at the centre of the computer screen in front of you.
Use of an armrest on the chair is important to take some of the strain off your neck and shoulders, and it should make it less likely for you to bend forward while sitting.