Will I get frowned upon by pilots and atc by using large aircraft on small, intercontinental routes?

I’m a massive fan of the 777-300er and the 787, and I really want to fly them on the network. however, I read on a different post in the sub that it’s bad to use large aircraft on small routes, I typically fly the a320. Typically from the UK to Germany (typically wherever there is ATC to be honest)

I know the network is about realism but will I be ok and not cause any disruption or disturbances?