much better, adverbial phrase
Colloquial. As an intensifier: ‘really well’, ‘enthusiastically’, ‘energetically’, etc.
1975 ‘Blossom’ in Darling 29 Jan. 103I had a ball that night — go-going on the table for this ring of chuckling ole dads in paper hats, most of them poegaai, all of them egging me on much better.
1985 P. Slabolepszy Sat. Night at Palace 40I was gripping this chick...Her folks were out and we were fraying much better.
As an intensifier: ‘really well’, ‘enthusiastically’, ‘energetically’, etc.

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