Covid bereaved - people who lost loved ones to COVID
angered by - the previous noun is angry because of the following part of the sentence
Badenoch’s - a person, possessive
‘insulting’ - you know this one
Partygate remarks - comments she made about Boris Johnson’s government’s behaviour during lockdown, the scandal known informally as “partygate”
Idk what you’re saying about the “Lemmy version” given that you’re entirely free to do so - in fact, you just did do so