There’s no grand conspiracy here ..... leopard wrasses are absolutely difficult fish to keep. They ship and acclimate poorly and often come with internal parasites. Once past the initial acclimation, it’s not difficult to get them eating, but absent treatment many will still gradually waste away. Pat yourself on the back after you’ve had one for a year. This is actually one genus that is well bought from LFS since they bear the acclimation losses. Just make sure that the fish does not have pinching behind the head - 99% of the time they’ll not survive. Some species are easier (meleagris, bipartitus, ornate), others trickier (negrosensis, moyers) and still others even trickier (Potteri and Choati). Drawing any kind of useful conclusion from a sample size of one is ..... well self evident I’d think.