You go into work and discover that a coworker isn't happy with some code you wrote because they don't like it. They go to your manager and tell them that you're being a problem by writing code they don't like. Your manager, being very skilled in conflict resolution, makes a technical decision to avoid whatever tool you used which caused the problem. In your case it was OOP.

That's it. You've been told. No more OOP.

The manager has figured out what's good for the business and you figure that listening is what's good for your job.

Though honestly, having a manager that's interested in how software is made is a gift. My managers for the last 20 years have all been like "okay, let's do planning poker and everyone make sure that all the fields in your JIRA tickets are filled out."