These people do exist. I'm still very new at 1000 hours and a few people make me uncomfortable. I just stay professional, follow SOPs all of the time and ensure that I speak up there's anything I don't like or if there's any doubt in my mind (just think board of enquiry and what they would say if I didn't speak up).
There are people who I dislike flying with and don't look forward to it because of their attitude or their flying. But I just remember what I have been taught in training and what I've learned on line and try put that into practice.
Then you get the guys who insist something one day and the next guy the day after tell you off for doing something in a way that your captain the previous day insisted you do.
I like a full and concise brief, but I've been stopped from doing it with guys chipping in and saying "Standard Anytown, no questions" before I've had a chance to speak.
I think my flying is ok as a whole but there is one particular guy who always asks 'how many hours do you have now?'. And then proceeds to say 'at X hours you should no better' or 'you shouldn't be doing that at X hours' having done exactly the same as the previous days with nothing said. It's very demoralising and is in no way constructive criticism (which I always welcome) this guy does it to belittle me and put me down. But I just tell myself we have 100 good guys for every bad egg in my company. My personal favourite was him showing me now to land on our notorious runway 'properly' only for him to screw it up royaly - but you live and learn.
There will always be guys like the one you discuss. They just want to get through the day without having to file a report and/or to show you who is boss. You'll also get the guys who really want to develop you as a FO and when I fly with those guys I use it an opportunity to learn something new, discuss something or to ask questions and to help me improve my knowledge and develop.
I appreciate I ramble, but 'be a chameleon' was drilled into me since day one. Just go with the flow and unless there is an immediate threat to safety just go with the flow, keep professional and follow SOPs.
It's a funny job at times!