As long as sideloading is a thing, I don't use the Google app store. And I don't install malware like Instagram - not that it's very likely to work on my deGoogled Android cellphone.
Of course, now that fucking Google has declared war on deGoogled ROMs, what I'm saying here is pretty much a dead-end. But as of today, it's still an option.
Fuck Google.
Also, in case it bore repeating: fuck Google.
And finally, I would be remiss if I didn't mention that Google can go fuck itself.