This was a long time ago, when I was an 18 year old junior dev in my first job and still studying at college part of the time.

The lead programmer saying things like “we [meaning the experienced devs] are alright if this project goes wrong but you need to prove that you can deliver because you could be out of a job”.
Thanks. Mofo set me right up for lasting confidence issues.

Less than two years later I was killing it when the language they used became object oriented. That asshole couldn’t understand any of the concepts.
That feeing of being out of my depth has lingered though.