I voted online only DRM, because that's the only thing that is inherently bad. Well, I guess misleading trailers are also inherently bad, but as others have said that's really something that you have to be wary of when it comes to advertisements for ANY product, so online only DRM is the only specific gaming trend that is inherently bad.
Early access, day one DLC, free to play, even season passes and microtransactions, are all things that can be used in a good way. While there is a great potential (and precedent) for abuse, they are not inherently bad. Early access can get genuinely great games made that would not have had the funding otherwise, day one DLC can be used to give a bit of extra content created between the time the game went gold and the time it releases, etc.
Online only DRM, however, is at its very core a way to shackle the consumer, dictating when and where we can play games, and introducing the very real concern of not being able to play the games at all once they drop support for it.
Early access, day one DLC, free to play, even season passes and microtransactions, are all things that can be used in a good way. While there is a great potential (and precedent) for abuse, they are not inherently bad. Early access can get genuinely great games made that would not have had the funding otherwise, day one DLC can be used to give a bit of extra content created between the time the game went gold and the time it releases, etc.
Online only DRM, however, is at its very core a way to shackle the consumer, dictating when and where we can play games, and introducing the very real concern of not being able to play the games at all once they drop support for it.