I miss being able to customize my feed through subscriptions and blocks. I could hide ads and ignore specific communities. That's not at all possible anymore, and the ads have gotten much sneakier.
Ummm.. I might be misunderstanding something, but I feel like I've been able to do exactly that here. Are you using an app or browsing directly on the website?
The app I'm using (Thunder) allows me to block users, communities, or entire instances, and also has keyword filtering.