I agree with this.
While I enjoy both cinematic universes immensely, I feel that DC's films cause me to think a little more in depth about what's happening, which is something I like because I like being challenged intellectually in that sense. Little details in their films can make all the difference in the world between understanding or not understanding it, so you really do have to pay close attention when you watch their films. Based on my experiences and encounters, I feel that there are several people out there who don't want films to challenge them intellectually to where they have to think about something; they would prefer everything be spelled out easily, so to speak, right in front of them because the purpose of them being at the cinema is to escape from reality for a few hours, which I can completely understand. DC's films are more serious in tone and evoke more emotion, while Marvel's have the fun and lighthearted aspect to them. I like the contrast between the two cinematic universes. If it was utterly demonstrable to me that DC was simply trying to copy Marvel, I honestly probably wouldn't enjoy their films as much.
Another reason why I think DC films are more susceptible to criticism is because their marquee characters have been done in depth before in film so there's something to compare these current versions to, whereas Marvel doesn't really have a basis for comparison with their characters. Aside from a few campy films (Captain America, Hulk), this is really the first time a lot of their characters have had a major portrayal on the big screen.