个人认为：
改成以下好点
Every time when you want to give up,think about the reason why you chose it at the outset and the days you have got through.
应该是个时间状语从句,think开始为主句.choose过去式是chose,而不是chosed
“一开始,当初” 用at the outset好点 at the primary没有这个意思,primary初级的,用不太妥
you have got through做定语从句,省略that,修饰days