Is it considered a sin for a son to hate his parents, knowing that he does not disobey them or show them this hatred, but he is unable to harbor feelings of love for them due to their actions?

If you are dutiful towards your parents and treat them well, there is no sin in disliking them due to some of their actions that necessitate it, such as persisting in disobedience. However, you should not succumb to feelings of hatred. Instead, you should look at the good aspects of their character and be keen on speaking to them gently and acting kindly towards them. Responding to evil with good brings affection and protects against the evil whisperings of Satan, as Allah Almighty says: "And not equal are the good deed and the bad. Repel [evil] by that which is better; then suddenly that individual between whom and you was enmity [will become] as though he was a devoted friend."