Everybody sees matchups that they struggle with at times (such as Felton killing Bradley in the playoffs last year) but with Bradley those matchup problems are pretty rare.
In that series, Felton did most of his "damage" in two games, games 4 & 5, when he scored 27 & 21 points ... but lost both games.
In Game 4, Felton did have success "killing" Bradley ... by making 4 of 9 long 3PT bombs despite Bradley contesting them. That isn't something I'd worry about long term. Felton shot just 30% from 3PT land that season and I wouldn't have guarded him tight outside the arc either. Other than that one game, he sucked from 3PT land the rest of the playoffs.
In the next game, Game 5, Felton went 0-for-3 from 3PT land, but enjoyed "success" this time by working switches on Paul Pierce, who was not fast enough to cover Felton.
As I said, NYK lost both those games.
I think the mythology that Felton 'killed' Bradley in that series has grown out of proportion with reality.