The way people sound while davening is not necessarily an indication of what they are thinking and feeling while davening.
That said, it would probably be beneficial for kavanah if everyone were to slow down and say everything with good articulation and evident enthusiasm.
Regardless, we shouldn’t pay attention to other people davening because we’re not really supposed to be able to hear them anyway. Maybe we should create huge, spacious shuls in which everyone gets to daven at least 10 feet from anyone else?