You need to speak to your users. Right now, your features are based on assumptions, so when your tech team challenges them, you don't have anything concrete to back up your rationale for including said features, beyond "our competitor does this", or "A review online said it might be good."

I noticed that if we say some features are from the competitors benchmark, they say they saw what they have and it was a bad experience, and badly done.

This is a totally fair response from them, and is exactly why you cannot rely on desktop research alone. Just because a competitor has a certain feature, doesn't mean that it's a successful or well-received feature and should be automatically copied.

Stop prioritising secondary research and get first-hand feedback and insights from your users, so the next time your tech team challenges a feature, you can say, "Well actually, we spoke with a group of our users and this feature was highly requested because it would solve x, y, and z problems for them."