I've been doing all this shit for over 20 years now and I understand you.
I too get fucking tired and frustrated sometimes.
Then I always realize that generations before me have also worked on all this crap and died without seeing any success.
I, on the other hand, probably get to be there when all the bad shit goes to hell.
Then I am motivated again and fight on.
Don't get discouraged.
In all my 20 years of research, it has never been as hopeful as it is right now.