I was embarrassed about my incapableness.

我为自己的无能感到羞愧。

I have been 22 years old now. When I found I cry to the wall for my loneliness and sorrow(sadness)year by year, I was embarrassed about (shame) my incapableness.

我今年22岁了，当我发现我在年复一年的对着墙壁哭诉自己的孤单与忧愁时，最终我是为自己的无能感到羞愧。