Thanks!

Us as a society create this facade to make it seem like we repress our prominent primal instincts. Most are in denial of this fact and try to put out this front that we are meek and unpretentious.

Yes.

Everything we do in the end is motivated by how it makes us feel.

Not everything IMO but most things are if we are honest about it. You can see this in people who have damage to the pleasure centres of their brain following strokes (for example) - they lose almost all motivation to do anything good or bad.

Even those so called selfless acts are ultimately self-serving in that they satisfy some desire within us to exhibit benevolence or justice for humanity.

I think this is true. We help others because it makes us feel good. I don't think we would do it if it made us feel awful!