So you're avoiding train because of a problem you've invented in your own head? Yes, there are more safety messages than normal (which actually if anything mean less "See It Say It Sorted" etc than usual). A "Bombardment" is certainly not what I'd describe it as.
I think it depends where and when, to be honest. GTR, thankfully, is fairly minimalist - just a couple of fairly non-domineering signs on their trains, and a brief announcement which plays every half hour. No staff presence on the majority of trains.
However this certainly isn’t the case everywhere. A work colleague who travels to London using EMR reports there are some guards making virtually constant announcements, as well as parading up and down the train after every stop challenging people over masks. I’ve heard same regarding LNER.
The atmosphere on trains can be strange at times too, sometimes bordering on passive-aggressive at times, normally revolving around either sitting too close to someone else, or of course masks.
I can see it could be off-putting. I’ve certainly found myself using the car much more over the last year. Whereas train used to be the default choice, especially Mondays to Fridays, now I’ve found I’m tending to use the train by exception.
The single biggest thing which would go towards restoring my previous train use would be getting rid of masks. Apart from a couple of very short local trips I haven’t used a train for non-work purposes since 2019, and my work-related use is probably about 60-70% down on usual.