If that’s the level of communication you need to work on yourself first.
I don’t know what that picture, what’s wrong with it (I can see flaws) but I’m not sure what it is or what it ‘should’ look like.
I worked with experienced designers before and prepess guys all my life.
I overheard one of the most senior and excellent designers talking with a customer and they said it might not be possible to do something but they would try.
I took one look at it and knew it could be done and I ended up doing the work for them because they didn’t know how to do it in Photoshop.
Client was happy.
Everyone has different skill sets and different experiences.
My idea for you.
Run weekly or monthly ‘quality’ meetings.
Showcase the original - what was requested - and what the result was - and what the result should have been.
Explain how you got from
Original - the request - why the result was not right - and how you got the result.
By showcasing best/worst examples in quality meetings and sharing techniques - probably a weekly basis - if you want to expedite. Then go to monthly meetings.
Get the team working together, sharing ideas, what’s acceptable, what’s not acceptable.
Most importantly, don’t single anybody out.
And offer people to do courses. If they need time within the working day to do an online course then offer it to them.
Get them up to speed.
Not everyone is the same level. And that’s probably your worst misconception about new hires. Everyone has strong spots, everyone has weak spots.
I could probably walk into most prepress jobs and hit the ground running. But if that prepress company specialises in Illustrations and every staff member must be a strong Illustrator then I would struggle greatly. I cannot draw and would need extra training for that type of role.
Or hopefully, the boss would just not task me with things like that and concentrate on what I am good at and leave the fancy stuff to other suited members of the team.