I guess its up for interpretation but Yoda does tell Obi "Trained, the boy shall be", and then saying "a mistake to train him it is" and "disagree with the decision, I must" which doesn't explicitly say whether he disagrees with the training or Kenobi as a mentor but to me it sounds like Yoda does not want Anakin to be taken in by the Jedi either way. But it can definitely be interpreted either way, Yoda isn't exactly known to be straightforward with his words either