Short and simple review (from someone who enjoyed the first film, so had some hope this wouldn't be as terrible as all the other DC films end up being).
The only thing that made this watchable was Gal Gadot as Wonder Woman... the rest was just boring and forgettable.
Ending is drawn out (like every other part of the film) and just cringeworthy. When the end scene started, it was so painfully obvious how it was going to end and had such a strong urge to walk out.
For how it ends, the movie is way too long. By the end of the film, even the intro scene feels completely pointless.