Not true. In fact, the European Parliament is much better than national parliaments at saying ‘no’ to controversial proposals. And of the proposals that it accepts, very few go through without significant amendment. Evidence
In this way, the European Parliament is much more effective than national parliaments such as Westminster, as there’s no compliant government majority to ensure that proposals are whipped through. Just think about it: it’s headline news if MPs ever vote against the government’s wishes!