Is it bad to leave after 1.5-2 years already?

Hi all, I joined MBB straight after university, but I am not super happy at the job. Leave my girlfriend alone at home the whole week, every evening super late working hours, not being able to do the type of work / project you enjoy all the time ... This is making me think about leaving already, however I wonder how bad it is / looks to already leave after 1.5-2 years.
Curious to hear your thoughts / experience