One frustration is that it has morphed from things around consumer harm to a new focus on harm to other ... businesses.
Google downranks some crappy content farm / shopping aggregator - bam - antitrust complaint. Yes, it hurt that business and so helps google shopping - but no one asks - do users like these crap content farms? Same with google finance - I liked it. Now google can't prioritize that - even through I want it and so I get sent to a giant ad laden garbage fest of another finance / stock quote site.
The other issue consumers no longer have any leverage with respect to very large businesses and govt is no where. So Apple can build a very valuable offering by playing "cop" in their closed garden. That is a consumer benefit.
In other words, you individually would never be able to negotiate a deal where someone would let you sign up for their service anonymously, but apple can force that.
They can force trials signups to have full details of renewals (same font).
They can force folks to allow you to cancel subscriptions without huge advance warnings and will remind you of subscriptions in advance. Yes, this sucks for developers, but the consumer is helped by these steps.
Until govt steps in, I'd love for them to back off on folks creating these places where the tons of crap the govt allows on the broader internet is not permitted.