Empathy, I’m not sure, but I can confirm the lack of patience.

I had less time, less energy, and my tolerance for BS plummeted accordingly.

The lack of tolerance towards BS and people being difficult in general has gone out the window for sure. In the morning, sure, you get a lot of slack, but when the kindergarten closes at 16:30 and it's now 15:30, I don't have time for people being difficult. We solve the problem, we have 30 minutes, if you're being difficult I'll ignore you. You can complain tomorrow.