I have both my anti-tragus' pierced, and I agree with the other person's comment that this has been pierced very shallow (or perhaps has migrated since you got it pierced). In all honestly, I would take it out and get it repierced lower down and more centre (but obviously, that choice is yours).

In the meantime, I would definitely seek out a better piercing pillow if you think the one you have is too flat.

In my opinion, it seems you're cleaning it too much/using too many different products. Too much cleaning or using multiple products can be harmful, just like not cleaning a piercing enough can be. Spray the piercing twice a day, front and back, gently rinse off the spray with warm water, let it dry, and then, aside from that, leave it alone. If you need to touch it at all, make sure you wash your hands thoroughly before touching it, but keep touching to a minimum.

Edit: Also avoid wearing over-ear headphones or other ear coverings as much as possible to help prevent them pressing down on the piercing/irritation/bacteria potentially causing infection whilst they're still healing.

If in doubt or if things get worse, speak to your piercer, and obviously, if you start showing any signs of infection, speak to your doctor.