I cope like that aswell, that's why I always dive into some sort of entertainment and at night unfinished overanalyzing haunts me leaving me not being able to sleep.
As a male human I've always had a hard time dealing with sad emotions since for some reason I could not cry even if I wanted to. The last time I cried for real was through a japanese drama "1 litre of tears"(prob 5+ years ago?), recommended btw.
Either way I do understand you and you're not alone with it, I'm also coping till I can't anymore and lash out at someone if they drive me to insanity, unfortunately ending up being the sole reason for not having real friends or family I guess.
Most of the time I ignore them since I'm bad with dealing with myself(even though it's impossible to ignore mostly), but I occasionally am able to vent through taking aggressive walks while listening to music on 100% on my headphones giving zero fucks about my surroundings and trying to reach as many steps as I can(recently).
Anyways this is only coping while most of the time I don't really take my emotions seriously and let myself become numb to emotions not being able to process and progress.
When you say "reject the idea of it" and "mock it even", I do get what you mean and I've had that phenomenon happen to me aswell. But completely ignoring emotions always had me ending up worse than facing the pain and giving it decent thought, being forced to overthink though is really a pain in the ass and also happens to me literally all the time.
I've recently had a outburst of emotions inside and what I did was that aggressive walk and every once in a while one person or a group that crossed my path I would take out my anger on them in my fantasy slitting their throat and dark shit like that.
I can't really recommend that all that much since I don't know what that does with you, something changes within you when you imagine inflicting pain upon others I feel like.
I had a "meaningless" episode throughout my teenage years, asking the questions apperently no one had time for and everyone seems to dodge. Why am I here, who created this world... every question a human asks himself when growing up. My conclusion so far, "god" whatever it may be exists for a fact and I believe there is some purpose but at the same time that purpose which gives us meaning is unreachable in this life. The human mind just stops working at some point when trying to understand concepts that go beyond us.
Doens't btw mean that I see meaning in everything now, I still ask myself if there is any point living this life that apperently only shows dystopian characteristic but I am clinging onto that little hope I have left seeing my future play out and hoping for that karma concept to be true - and if not in this life, maybe in a possible afterlife.
But yea sharing this experience of mine might give you some new idea or perspective for yourself.