I agree with Ray. Being "nice", bubbly and easygoing doesn't excuse incompetence. Being clumsy and an airhead are not definite traits that you are born with that you can't change no matter what. As we have seen in this chapter, Maya simply wasn't putting in any effort.
Until now, Maya hasn't been nothing but purely and objectively detrimental to Ray's career. Ray has her own circustances, because of them she has studied, trained and worked harder than anyone; and she has the knowledge and abilities to prove it. But because she was arbitrarily paired with Maya, Ray is being deprived of the progress and the opportunities that she had rightfully earned.
"Ray will be fine even if she is being held back, so let's make her take care of Maya". That is what the teacher was probably thinking. Ray is actually being penalized for her hard work and excellency, just so Maya can receive special tratement. It's perfectly normal to feel frustrated.
Let's hope that from now own Maya starts taking things more serioulsy. Because, let's be honest, she doesn't deserve to be there. If that furball hadn't apparently bestowed the gem eyes upon her, she would never have been accepted. She doesn't only lack the knowledge and the skill, she also lacks the discipline, the dedication and the proprer mindset to work there. The Ministry doesn't exist just for her to have fun.
We will see how everything unfolds.