Watched my friend change careers twice and end up miserable both times. Here's what she finally figured out.
My friend went from teaching to corporate training to HR. Each switch she was convinced was the answer. Teaching was draining. Corporate training was boring. HR was political. Three careers, three different complaints, same unhappiness. What she finally realized was she kept changing the WHAT without understanding the HOW. She liked small groups, direct impact, fast feedback. Teaching had that in the classroom but the school system killed it. Corporate training killed it with bureaucracy. HR killed it with politics.
She's now running onboarding at a startup and actually enjoys her work for the first time in a decade. Same skills she always had. Different operating conditions. For anyone looking to change careers, it may be the environment. Consider that before making a jump.