Two tweets, posted at the same time, one on Monday and one on Tuesday.
Impressions: -91% (9.6k v 105.5k)
Likes: -86% (61 v 424)
Total engagements: -79% (615 v 2955)
Engagement rate: 0.6% v 0.4% (higher for the deboosted one)
Conclusion: must keep the format on the left (sorry).