Instagram shows me puppy pics and untempting ads for tacky clothes. It sounds like you've had a bad experience with it but you should be cautious about generalizing it in such a grand, sweeping fashion.

Why? Instagram and Facebook are two heads of the same fucked up hydra that (allegedly) wrecked our electoral process, performed psychological experiments on people without consent, repeatedly violated peoples' privacy and elected to continually pay fines rather than clean up their malicious behavior. Mark Zuckerberg should be in jail, not the CEO's chair, and his company should be completely dismantled.

Instagram actually tells you when you've seen all your followed feeds for the day.

Hyperbole, much? It's a photo sharing site with ads. The rest is capitalism. If you want to fix that you're going to need to go a lot broader than Instagram.