To quote the actual abstract, not just the headline,
There is mounting experimental evidence that lifetime exposure to these increasing atmospheric CO2 levels can negatively impact the normal physiology of organisms. However, directly assessing this in humans is very difficult.
It does not say that they for sure know that atmospheric CO2 levels are going to be toxic within 50 years. It only says that, based on one examination of indirect proxies, it seems like that might be the case. Something which definitely should be studied further, because even the possibility of global atmospheric toxicity is worrying, but not something to jump to conclusions on, because doing so is bad science.
Their study result makes me feel kind of sick to my stomach too, I just want to keep a level head and not jump to "welp I guess we'll all be paying billionaires for clean oxygen tanks in 50 years".
If this really does turn out to be a problem we're heading towards, it's also premature to conclude that it won't get fixed. I know that if I learn that this is for real, I'm certainly going to be telling everyone I know about it and looking for ways to spur useful action.
Is it possible that this is a trauma response? I've had trouble expressing and feeling my own emotions to a somewhat lesser degree, and I've realized that a lot of the reason why is that I was punished for showing distress when I was growing up, hid and suppressed such things as a result. Learning about the concept of CPTSD (Complex PTSD, less like normal PTSD than it sounds at first), and practicing something similar to IFS (Internal Family Systems), have both helped me more than any of the therapists I've seen. Identifying internal "parts" and trying to listen to what they in particular have to say has helped me connect with and integrate my emotions to some extent. Expression has been happening in the form of a kind of freeform journaling, both writing and drawing whatever I feel like, which has worked better for me than normal rote prose journaling. I don't know if any of those concepts or techniques will help your situation, but it's what I've got to offer.
I, also, have had a fairly disappointing time with therapy. I'm currently seeing my 4th therapist and wondering how worthwhile it is to keep seeing this one. Most of the real progress I've made was on my own, just doing research and exploring the Internet (mostly Reddit though I'm trying to move away from using that). If I look for a 5th therapist I might look specifically for one who is autistic themselves to see if that works better.
I wish you well, and hope you find what you're looking for.