He was telling everybody about every little thing we were supposed to do and I hated that.
I didn't like the way he was bossing everyone around.
1) He was telling everybody about every little thing we were supposed to do and I hated that.
「彼は私たちがやるべきことをいちいち指示してきて嫌だった。」というニュアンスです。
every little thing で「いちいち」
または簡単に、
2) I didn't like the way he was bossing everyone around.
「彼はみんなを仕切るから嫌いだ。」
boss 人 around で「人を偉そうに仕切る・人をアゴでつかう」という意味です。
ご参考になれば幸いです!