Worship spaces are the hardest version of this for a lot of people, because they combine everything at once: the speaker is a long way off, the ceiling is high, the surfaces are stone or plaster, and everyone answers together from all around you.
What tends to help is a seat further forward than feels polite. Distance matters more here than almost anywhere, because the closer you sit, the more of what reaches you is the direct voice rather than the room. Many buildings also have a hearing loop or a small receiver you can borrow, and it is worth asking whoever runs the sound desk. They usually know exactly which seats are the good ones.
Responses and singing are a separate thing, and it is fine that they are hard. Several voices at once in a reflective room is very hard for almost everyone, and following along on the printed order of service or the screen is the normal way to do it.
The coffee afterwards in a tiled foyer is often harder than the service was. Stepping outside, or into a carpeted corner, is a perfectly reasonable thing to do.