Flexible hybrid schedule, but management changes hinder progress - Product Owner UBS Employee Review

One of the first conversations I had with someone, they told me 'don't get used to your manager because they change often'. Consistent management changes make it difficult to progress your career and complete an application build. I was there for 5yrs and had 4 different managers within the same department. Each manager had a different view on how the application should be built. Five years later and the application has not been built