I think 'excessive' is a subjective word in many cases.
I think it is about the voice being suitable and using a suitable tone. I find Southern's 377s a bit annoying as they announce the full calling pattern at every station, but because it's voiced by Julie Berry and she uses an informative tone rather than a commanding one, I find it quite easy to ignore/zone out from.
Some TOCs that use badly recorded announcements for general things like specific engineering works and some safety messages (I assume usually made by staff) I find are TPE, SWR, TfW and ScotRail. I don't think the TfW 'Buy before you board'/'This platform slopes towards the track'/'See it, say it, sorted' messages are from the same new female voice on board (which is just as bad imo, and uses a rather sharp tone which is hard to zone out from).
Also, those DfT commissioned tactile paving announcements by Greg Scott are very commanding (borderline aggressive), and hearing him booming out of all the speakers at Exeter St David's (as an example) makes it rather a miserable place to wait for a train.