there is no such thing as overtraining just undereating

TBH overtraining is an overused word but can happen some of the signs are You are experiencing over use pain, and strain symptoms in joints and/or muscles.
You are tired and irritable all the time, yet don’t sleep well.
Strength levels are significantly decreasing,
dont train to faliure on a regular basis,eat well,sleep well and there shouldnt be a problem.