the reason i laughed at the video,was because i am also a frustrated guitarist,and can totally relate to the guy in the video (have actually chucked a guitar out of a 2nd story window once out of frustration/am not proud of that).
i also have severe anger issues,but am hoping i can get some help for them (i do resort to having tantrums like a 5 year old sometimes/am not proud of this either 😳
i wish you all the best iolo in feeling better. i just need to try and get some help for my own demons also (have started to again though by seeing someone recently).