Spurs were impressive for last night's 2-0 Champions League win against Borussia Dortmund.
Speaking before kickoff, Bale said on TNT Sports: "The players still have to go out and do a job. Obviously, the manager sets up a system, a tactic, a style of play that they want to do, which hasn't been working of late.
"Also, the players do need to take responsibility. Obviously, they're getting booed as well.
"They're struggling more at home than anywhere else. I think that comes with the pressure at the stadium. The fans are letting them know.
"As players, when you're getting booed, you do feel it. You do lose that bit of confidence. When you're playing at such a high level, if you do lose that little bit of confidence you'll get punished.
"Especially playing in the Premier League and the Champions League at high levels against opposition who will take advantage of those situations that are going on."