Overwhelment and frustration are forms of attachment to desire, whereby you have become identified with the mind's calculation about what end must be attained before you can relax. However, desire never ceases, and new 'ends' are constantly being calculated according to the new desires that spring forth from your individualized point of view.
You aren’t capable of pleasing people. EveryOne’s experience of pleasure is created from within. When you try to please them, your energy is given to reinforce the root of all frustration - belief that pleasure comes from ‘out there’.