Emsculpt Neo & Venus Legacy on thighs made my skin laxity worse (photo w/ circle) - best fix?

There are really no non-surgical treatments that affectively tighten skin in my opinion.
Repeated micro needling, probably comes the closest.
Radio, frequency treatments can cause loss of subcutaneous fat and this can cause secondary skin laxity issues.
I suggest you discontinue with the treatments.
Much that can be done at this point.
Some providers may recommend bodytite or Renuvion.
These treatments are typically done in conjunction with Liposuction and I would avoid Liposuction if you want to maintain your skin quality.
Best,
Mats Hagstrom MD