Welcome to the forum,
How much time do you spend with your birds and what is their cage set up? Do they get out of cage time?
-It is important you spend a few hours with your birds a day, and that they have a large cage with toys and foraging activities inside. They also need out of cage time to really fly and exercise. If you have a very large cage, it is ok if they don´t get out some days of the week, but if your cage is smaller they ned to be let out most days.
You may want to take a break RE stepping up and petting. When the bird is scared, forcing these things upon him will result in a biting response.
From what you are saying, both of your birds are scared of you. One is repsonding with fight, the other with flight.
Spend some time just sitting near the cage, talk to the birds, offer some treats through the bars. When the birds are out of the cage, keep treats close by and reward them if they come over to ¨explore¨ you. Offering treats in these situations is postive reinforcement, they will associate you with good things and over time will not be scared of you as you are the ATM of good things.
Forget step-up and petting for now until the birds are comfortable around you.
Good luck