It seems she wants to make him good enough for her
It seems she wants to change him to bring him up to her high standards
Women with big egos try to bring their boyfriends up to their level by changing their looks and fashion style
「彼女は彼を自分に釣り合う男にしたいみたい」＝ It seems she wants to make him good enough for her / It seems she wants to change him to bring him up to her high standards
「釣り合う」＝ be good enough (for 人） / be at the same level / match one another
「プライドが高い女の子が、彼氏を自分に釣り合うように、おしゃれに改造しようとしている様子です。」＝ Women with big egos try to bring their boyfriends up to their level by changing their looks and fashion style / Women who think a lot of themselves often try to make their boyfriends "good enough for them" by changing their looks and fashion style
「プライドの高い女の子」＝ woman with a big ego / woman who thinks a lot of herself / snobbish women
She seems to want to turn him into a guy who is worthy of her.
こんにちは！
ご質問ありがとうございます。
ご質問について、いくつか言い方が考えられますが、例えば、
She seems to want to turn him into a guy who is worthy of her.
とすると、「彼女は彼を自分に[釣り合う](https://eikaiwa.dmm.com/uknow/questions/75161/)ような男に変えたいみたいです。」となります。
役に立ちそうな単語とフレーズ
worthy of ～に値する、～にふさわしい
match 釣り合う、似合う
style スタイリングする、服装を整える
appearance 外見、見た目
参考になれば幸いです。
イギリス 
日本 
