my worst dev sin:
Commit and go home on a friday not waiting for the build to pass.

Tons of notification from counterparts the following monday

I remember the days when your only problem is creating an asterisk pyramid with for loops. Unlike now when you are thinking how idiotic a user can get.
Good old days

JS framework, where everything you use is outdated

When your company gave you a sucky increase then 5 months later, after all your motivation has dried up and have fucking decided to look for another job, they gave "a just enough would have been better if it was earlier" off cycle increase.

Now I'm stumped