It's not just DC's problem, it's Warner Brothers' problem because the studio had success with Superman and Bateman in the past. The familiar formula to bring in an audience, but it isn't guaranteed if screen writers are not paying attention.
The Flash, my opinion, was not as good as the 90's show because Barry Allen is an adult. It is good that these actors who were in the 90's show appeared on the new show.
But you are correct that they copied from Captain America:Civil War with Bruce Wayne meeting with Barry Allen just as Tony Stark had done when he meets Peter Parker.
Of course, Tony didn't have to say what Bruce said.
Barry Allen- "What's your super power?"
Bruce Wayne- "I'm rich."
I like Aqua Man. He is like Superman but underwater. Cyborg needs to be reworked.
The difference between DC and Marvel are that DC stories are more plot driven, while Marvel is more character driven.