The Hubble tension is "bad" (i.e. shows a problem with) for current models of cosmology, hence strengthening it is making it "worse." Its like a hurricane, a strengthening hurricane is worse.
It's just a weird combination of something mostly considered positive with something negative.
Like strengthening my weaknesses.
Where's the positive? If you've got a strengthening tension headache, there's no mixing there. Tension in your head, tension in the room, tension in a Hubble, it's all bad.