The problems of these, among other things:
- mixing up burnout risk with burnout
- mixing up burnout with physical or mental fatigue
- not serving any purpose (i.e. not providing good directions)
Burnout is primarily a negative change in perception, and it's a spectrum, obviously. You get burned out when your perception of the same situation gets progressively worse. This can be caused by various factors -- exhaustion, doing stuff that doesn't match your values, etc. It can also be prevented in various ways; i.e. you can do very exhausting work and not get burned out.
A really simplistic, but fun/useful way of detecting burnout (not the risk): if you regularly think that you and your team/company/environment work hard, but your customers/broader company/other teams are stupid/not intelligent/not constructive, then that's the first phase ('us vs them'). This can progress to the next phase, where it's more like 'me vs them', so you despise most of your environment. This is when people tend to leave. The last step is apathy, people rarely end here.
It's not really possible to move backwards on this scale without changing roles/work/colleagues.