Brentford actually played a defensive game in the second half, just like you said. Chelsea did exactly what you said in the second half. Chelsea scored twice in the second half to take the lead against Brentford, but Brentford levelled up against Chelsea in additional time to deny Chelsea all three points. Well before Brentford vs Chelsea started, I already made it clear in this thread that Chelsea wouldn't defeat Brentford, and the game played as I expected.
Chelsea did everything they could but in the end luck was not on their side. At first I thought Chelsea would play with confidence because they won their previous 2 matches but Brentford know how to handle Chelsea, this draw brings Chelsea down to 4th place and this is also an indication that they are not fully ready to compete or maybe we should wait for them to fully adapt. Chelsea next challenge will be playing away against Manchester United, I can't predict anything because I think both teams are in almost the same situation.
I don’t think it was about luck, I always said this Chelsea team aren’t good enough, every team has a game plan and Brentford showed there game plan, Chelsea doesn’t deserve to win that game because Brentford showed up a real fight for a football game, Chelsea aren’t fully prepared to fight for the Premier League, the Premier League isn’t like the Pre-Season club World Cup, where they have to play this Brazilian team and played a tired Paris-Saint-German, I think because of that Competition Chelsea and their fans felt they’re good enough to play and win the Premier League, You don’t just win a Premier League with making so many changes in your squad, just like what they have done each and every season, I doubt if this Chelsea team is going to qualify from the Champions League group stages, because they obviously looks like a conference league team.