People who have to put every good deed on SM to try and make them look good is annoying agreed, but according to mumsnets everything single thing is virtue signalling, it's even more tiresome than the virtue signallers.
Offer help to neighbours- how dare you, don't you know I can look after myself!
Post a funny meme- how dare you I didn't find it funny
Share a nice photo of your kids- How dare you humblebrag
Say something nice about NHS workers- Virtue signaller!
Say something nice about cleaners/delivery drivers- Some classist bullshit response.
Honestly so many of these responses are virtue signalling in themselves that you are so above it all, because you disapprove how others use social media. Just unfollow the annoying braggers, it's not that difficult! But people don't do that because they enjoy complaining and feeling superior.