Why can't Justice League’s Flash phase through objects?

Ok. Time to silence all those haters saying that the Justice League Flash was too slow.

Look, Ezra is just at the start of his career as the Flash. He even stated that he’s never actually been in a fight before. That should be enough tell you that he’s not yet seen his full potential. In comics, the Flash had been an active hero for years before learning to phase. In the CW series, I think it took Grant Gustin’s Flash almost until the second season to learn how to phase.

So how do you expect Ezra, a Flash who is just learning his powers, and has never really been pushed to his limits, to know how to phase?

Besides, why is everyone giving the Flash so much hate for not being as fast as his comic-book counterpart? In the comics, Superman was literally strong enough to push the Earth. So was Wonder Woman with the aid of the Martian Manhunter. Neither of them are performing feats like those in the movies. So why all the dislike for Flash?

…And honestly, it would make for a very boring movie if the Flash were doing all the OP things he can do in the comics. I mean, the guy can time-travel and distort physics with his speed. He’d have no real match if he weren’t nerfed.