The 22-year-old Dutch playmaker joined the Londoners from RB Leipzig for £52 million this summer, but has yet to make a significant impact.
Henry admitted he has an anti-Bundesliga bias, noting that success in Germany doesn’t always translate to England while citing Florian Wirtz’s move from Bayer Leverkusen to Liverpool as an example.
"It's not easy to arrive in a team and perform straight away. We can see Florian Wirtz at Liverpool, but I always have a question mark on people that perform in Germany,” Henry told Sky Sports.
“That's only me. I'm not saying that they won't perform in another league. I'm just saying, because of the way the league is, they're really stretched. So if you can run well, you're going to have a lot of opportunity, goals, assists. People can run with you in this league.
“So it's very difficult. Do you think the managers right now are letting their players dribble or do they want to control everything to make sure they're not going to get countered? Playing a low block all the time is not always easy to create. Look at Arsenal.
“We don't create a lot of opportunities. We score a lot on set pieces. I'm not going to go back to the old story and everything, but you need to find a way to score goals. So you're going to create way less than what we used to be able to do in our time because teams are playing low.
“They don't try to bite or come out. So the spaces are tight. And if you don't allow people to dribble and make mistakes, like I always say, the reward is in the risk. Where are you going? You're not going to have the stats of creating. And if you don't take your chances when you have one, well, you're in trouble."