You remove the app, you will just end up using the website. Best thing is to just delete your account on whatever app you have the most problem with. You will come up with 1000 reasons not to though, because you are an addict, and that’s what addicts do.
The emphasis on there being an FBI connection seems naive to me, as I had always assumed some gov agency coordination on some level, both in software and hardware companies. Furthermore their involvement does not sound that deep/frequent, some pointed out once a week on average, if viewed in context proportional to amount of users, both real and fake, this does not seem that large.