“It is what it is” works fine for traffic. It’s a weak motto for your whole life.

Acceptance is exactly right for things you cannot move: the weather, the delay, the decision somebody else already made. Applied to everything, it turns into a way of not trying that sounds like wisdom. The skill is telling the two categories apart, which takes more honesty than either shrugging or grinding.

Take one thing you have been shrugging at and ask whether it is genuinely fixed or just difficult. If it is fixed, accept it properly and stop spending energy there. If it is difficult, name the first step and do that this week. Most of what people accept was only ever in the second box.