I am in a somewhat similar situation. After closing my web company recently (2019), I have focused purely on DS and the hand-off process. In my case, I have an

I am in a somewhat similar situation. After closing my web company recently (2019), I have focused purely on DS and the hand-off process. In my case, I have an interest in front-end development (React), refreshed my JS knowledge (https://eloquentjavascript.net/ https://eloquentjavascript.net/), and moving forward with this course (https://designcode.io/react https://designcode.io/react). Frustration can come from different angles, company, team, or personal. Working long years as a PM and business owner, I found that sometimes the changes are inevitable. Some vacation and personal time can help for future adjustment. Good luck to your friend.