heat of the moment 一时的冲动
The only thing I really get easily angry about is slow drivers or walkers when I'm in a rush! But maybe slow wifi would get there too haha.
嗯，我唯一觉得好容易生气的就是当我很急的时候碰到开车很慢的司机，或者走很慢的人。呃，可能Wi-Fi慢也很气吧哈哈哈。
This is winding me up. / I'm livid. / I'm so pissed off. / My blood is boiling.
我好生气。
Bloody hell!
该死的！

I thought you were better than that.
我本以为你可以做得更好的。(你太让我失望了。)
I'm not an argumentative sort of person. I always end up apologizing first if I'm in the wrong. I'm terrible at holding a grudge also. I forgive people after two minutes haha.
我不是那种会吵架的人，如果我错了的话我都会先道歉。而且我也不会记仇，都是两分钟就原谅人了。
I wasn't thinking straight.
我有点不在状态。
I had no right. 我没资格 (那样做那样说)。
That wasn't about you.
不是你的问题。