In my opinion, it is best to use Bet Builder in matches between a favorite and an underdog, where it is easier to determine the winner, and where there is a higher likelihood of many goals being scored, or overall dominance by one of the teams.
Not all games works in favor with the favorite team. Using bet builder means you are placing your bets in favor to the favorite team since you mentioned that it’s easy to determine winner while some favorite team lose the game or start slow with their game then just recover in the end.
Betting on bet builder means the game should flow according to your prediction from early to late game or else your bet will lose already.
Unless you can predict a staggered outcome.