It definitely is - that’s why ADHD is considered a disability. Shit is just hard for us and not even medication is a complete fix.
I think the most important thing to do is to try and align what parts of your life you can to make yourself most likely to succeed (i.e. perform in society at an acceptable level) and, fucking crucially, forgive your damn self when you fall short. You’re dealing with a disability, a shame spiral leading into depression won’t do shit - be kind to yourself and let your brain relax when you are able. It is tiring to act un-neurodivergent but most of us need to do that to keep food in our belly - so let your brain indulge itself in your off time.