I can relate with that.
I was working on an operation that has the incredible track record: 74% of reliability (in a daily batch), 2 Engineers to serve 12 Analysts, stack running an old version of Haddop and Spark (2 majors down at least) and the company hired a technical PM.
The first measure of this PM? Setup meetings with consulting behind our backs, plus tons of politics with upper management, and the cherry on the top was he thought that was a good idea to move the Data Engineering team to a Front End team since “it’s more or less the same and a developer is developer everywhere”.
Final result: everyone quited and he eventually was fired with 1 year of delay.