sorry bout the TBH
I too lost a TBH cutout earlier this year to ants.
In the shady, more wooded areas, big (1/2") red ants rule.
I had the cutout in a TBH nuc, found some SHB and thought I would put them into a TBH with screened bottom.
Bad Idea!!! the next day there were no bees and a box full of ants.
All my other hives are solid bottoms and only one entry hole 3/4" dia.
So far, no problems with SHB or Ants in any of them.