Teammate problem

Sorry that you’re in such a situation. These kinds of teammates are impossible to deal with.

Tell them that this is not a criticism of their character - but just suggestion for how you all can work better together. This will ultimately help both of you grow as people

Let them have their way. Sometimes they hang themselves.

read some dark psychology book and learn more about manipulation techniques. It will help you deal with such people. Disclaimer, these people are generally good and is normal but they do cause troubles. I guess it’s debatable.

That person may have egocentrism and and narcissistic personality disorder. My advice is always aware of such people and don’t let yourself affected by them. As they generally have less empathy certain life conditions. They aren’t bad as they can be empathetic to many other conditions. But is a problem if that conditions isn’t with you.

Serious trust issues here. Build trust. It is clear that your team mate does not trust you. Get to know him better, bond, share meals or drinks

Noobs should keep their trap shut. Give feedback privately if you want a connection. Don't make him look bad in front of team. If he is senior, give some respect.

Self reflect if his defence has a point. Nothing wrong in someone arguing back against your feedback, even if it is on every feedback. You should probably up your game to match the best engineer in your team.

Personal experience.. at times you need to tell a jerk on their face they are Jerk.. prepare yourself for the worst (in this case, he might leave) .. if you are prepared for that.. have a little open conversation and tell him you are not ok with certain things, not at any cost .. make your expectations clear, hear him he has any constructive feedback too Either he will leave or he will atleast try making an effort to not repeat mistakes (in this case seems intentional)

One of the best ways you can deal with it is to actually give feedback and leave it at that. He may or may not take it but ultimately if the feedback you give is good and if he is choosing not to follow that then most probably it will cause some issue later down the road, then he will be held accountable. All that matters is to keep your part known i.e. whatever feedback whether it be general attitude or technical, let someone else in the team or higher managment know that you have conveyed them to the person in question.

If you do get into an argument or any sort of fight, you will lose your sanity at the very least and IMO that is way more important than anything else.

IMO never argue with your teammate unless and until you have proven your self your one of the best engineer if your average don’t argue it will create distance between you and your teammate

Speak up with them and ask if there's something bothering them. If the concern is something professional then make sure to work with them to find a workaround