Plenty of protestant denominations are actually catholic. They are all Christian.
so it be wise to have a chat to the pastor and get to know, so that you can sort out your thoughts a bit more rather than just guess work.
It can be hard to to break what you have previously been taught.
Sadly too many change over to other denominations within Christianity because they have fallen out with the specific church over something.
I can be hard to understand where he is coming from because you have no background of what he is saying. Some one else walking into RC church would experience very similar to you in that it be natural to think that the priest/pastor is wrong because it would sound wrong and unfamiliar to their ears. That doesn’t make it wrong. plus if we have gone with misgivings then we are more than likely be hearing the faults too easily.
If you really want to understand the denomination that you attended then ask that pastor about what he said before assuming and letting others on here guide you into thinking he is wrong when they weren’t actually there to hear him and we all know what it like trying to report back accurately on something and is even harder when we have no real idea what has been said. So if you really want to know, contact the pastor and not split hairs about the differences here please