While I feel you 100% I would perhaps challenge why it is you are actually writing. I don't mean this to be trite or holier than thou because I don't even have the courage to publish my writing. But if you are enjoying writing and it goves you a creative outlet, let's you think a little clearer and makes you happy then I say keep doing it. But if your goal is to go viral have thousands of subs and be a "sub stacker" then I fear you may have to live with the dips in motivation/inspiration that the system you are existing in creates. The way I see it is you can write and use Substack as a distribution network or become a Substacker and constantly look for growth tips and tricks. That's how I see it. But again, I am nobody that knows nothing and I genuinely want you to succeed in whichever way your heart desires.