Both my wife and I (double vaxxed for 5 months, not boosted yet although were just about to do so) caught Omicron-flavoured Covid in the lead-up to Christmas and it wiped us out each for 2-3 days each, with a combination of fatigue, aches, fever, and violent coughing. Certainly worse than any cold or flu we've had up until that point.
I still have a pretty nasty cough and a throat inflammation.
Aren't anecdotes fun?