I'd settle for them just writing the characters as they're supposed to be. Superman shouldn't be a mopey and pessimistic. Aquaman shouldn't be a dude-bro. Deadshot shouldn't be Will Smith calling Waller "gangsta" or telling anyone to "white people that ****". Joker shouldn't be a Jim Carrey impersonating juggalo. Batman shouldn't be a rage machine that can't figure out he's being played by Luthor then do a complete 180° when he hears his mom's name--and don't get me started on Eisenberg's Lex Luthor.
What should Superman be then? It annoys me to read that, because everyone seems to have Christopher Reeve's face in their head when asked this!!!
Read the comics, Supes has been very serious for many, many years... and I didn't find him "mopey" at all!
As for the "Rage-Machine" Batman... not like he's never been that in comics before is it? Batman not seeing what's right in front of him or making poor decisions... yeah never done that before has he? You never read Knightfall or Hush? And Luthor has played Batman many times in the comics... that's what Luthor does!
The Martha scene too... I can't believe people don't understand that scene! It's not rocket science... in the movie, Superman knows Batman is Bruce Wayne, but at that point Batman doesn't know Superman is Clark Kent... with that in mind, Superman knows why Bruce became Batman, and knows the power that the name "Martha" would have on Bruce instead of saying Mom!
Deadshot - an assassin for hire that never misses... yeah they got that wrong didn't they...
Joker an unpredictable, homicidal psycopath... sounds like the Joker to me!
Aquaman - maybe he shouldn't be a dude-bro, but the MCU have made Thor that and the critics are all raving about that... and that to me is far, far worse!