I'm not satisfied with my performance; I need to work harder.

我对自己的表现很不满意，需要更加努力。

同一单元的其他句子

• I'm genuinely happy for you hearing this good news.听到这个好消息我真的很替你高兴。
• I've been under a lot of pressure lately and feel a bit overwhelmed.最近压力很大，感觉有些喘不过气来。
• I didn't expect things to turn out this way; it really hurts.我没想到事情会变成这样，心里很难受。
• Thank you for your continued support; I'm very grateful.谢谢你一直以来的支持，我非常感激。
• This incident made me rethink many of my life choices.这件事让我重新思考了很多人生的选择。