Have you tried writing incomprehensible bullshit in the actual tweet, I've just been posting random words and sentences loosely correlated to the image along with it and I get maybe two new followers a year and an average of three likes, i think I've gotten shadowbanned in the abyss with the bots.
My work does suck balls but sometimes I still get decent engagement so it's not just that, I'm definitely getting fucked by the platform too.