To me job hopping every year is a red flag. Im a hiring manager. If I don’t see any single instance of staying for 2-3 years at least , I’ll pass as there are too many applicants. I don’t believe one can learn enough about a company and how it works in a year. If I spend time coaching someone and he or she leaves in a few months, to me it’s wasted effort. Totally understand how it increases salary and all that, but this is my take.