you have made such a quick decision.honestly speaking,I am not__happy about the decision

妳這麽快就做出了決定。實話說，對這個決定我不怎麽不滿意

altogether（弱化否定語氣）太，十分，非常

再如：

We were not altogether sure that the comet would miss the Earth...

我們不能完全肯定彗星不會與地球相撞。

希望幫助到妳，若有疑問，可以追問~~~

祝妳學習進步，更上壹層樓！(*^__^*)