Hooker Shaun Lunt scored twice as Huddersfield powered to their second win of the new Super League season with six tries in total.
However, Anderson claimed the Huddersfield team failed to reach the standard set in last week's stunning 40-4 win at St Helens. Anderson said: "We were just about or slightly below average and, frankly, some of our play was pathetic."
He added: "The way this team is set up is to be direct. But for long periods we decided to play the touchline not the tryline. We've got a group of disappointed people in the dressing room after a 34-6 win, which shows where we're at."
He added David Faiumu was briefly knocked unconscious in the first half and confirmed Jason Chan was put on report for an alleged spear tackle after the break.
Lunt scored a try in each half while Danny Brough weighed in with five goals for the second week running. Star man Lunt was also involved in the game's opening try, scored by prop Crabtree, playing a new loose forward role, after just eight minutes.
London boss Tony Rae was happy with his side's overall performance, but was disappointed by too many individual errors. He said: "It was untidy. There were too many errors and it took a lot of energy out of us. We need to be more careful with our decision-making."
Rae fielded a completely different back-line to the one that featured against Widnes due to injuries, though he refused to use that as an excuse.
"It's a squad game," he said. "The lads out there were more than capable of doing their jobs. And I liked how we were as a team. There were positive signs."
He also highlighted the performance of Shane Grady and said: "He's made a solid start, but there's more to come from him and he's got to realise that within himself."