well, it is certain that it's a pygocentrus nattereri, as they age the red will go away and also depends on how well it was kept the color could have lasted longer or fade away much sooner.
from what I can see based on the updated pictures that it does have a case of gill curl, you can see the soft membrane is curled up leaving the gill exposed. as long as you keep water clean hopefully it will not get any worse.
the way the lower jaw look may be result of injury, as long as it's not hindering the feeding it's just an cosmetic issue.