we were ought to insert a negative leap second, but cowards got too afraid it would break code
It did not happen yet. No negative leap second that should have been inserted was skipped.
See this chart here:
https://en.wikipedia.org/wiki/DUT1#/media/File:Leapsecond.ut...
You can see the the positive leap seconds as jumps upward once the graph reaches around -0.5 s.
We were never close to reaching +0.5 seconds with a positive trend and we are still relatively far away from that.