Monks once called it
acedia, it was a well documented phenomenon ...
Indeed diversions won't remove it. I think this feeling of emptiness and meaninglessness comes when we haven't yet grieve the search for an outside truth/answer, and still are looking for substitutes to fulfill our hole.
And I'm sorry there are no right methods to get out there, as it is an individual path. I only remember I had to go right through my depression to "reborn" or something like that (but careful, this can lead to suicide...).
So perhaps you haven't sufficiently explored the dark paths of meaninglessness (yes I guess now you prefer the medication advice lol) and met your Minotaur.
But when we truly become aware that we
are the creative source, this temptation of boredom gradually fades away.
"My soul is a gushing fountain"