Hi, it is not very clear. I'll try to interprete:

When I get the rejected from clients,it was made me feel frustrated.
    ☺ When I get rejected from customers, this makes me feel frustrated
    ☺ When my services // my goods are rejected from customers, ...

I could thinking about who are supported me in my clients also tell myself what I want and need.
    = I always think to those who support me; and my customers tell me what THEY want and need
    = I try to think to those who support me in my activity; and I tell to myself ☺ what I want and need // ☺ what are my targets // ☺ what are the targets I would like to achieve