What should I do with this RBTA?

[RuGlu6]

Trying to "help" an anemone by manually moving them usually makes it worse.
try changing the environment around it instead.
1-Move the power head away from it just gentle flow (Tunze is best)
2- move the rock that its attached to so it will catch more light
3- Do not bother it too much even once or twice a week is too much shock
4-Try feeding but do not force food in to it, make a food paste or small chunks and with pumps OFF spread it over the animal.

It will have better chance to survive if you leave it along.
Most important: If your anemone is not showing sings of good health that means your water is not up to standard.

Go through basics and correct all the parameters first (measure all that you can Salinity, Ammonia No2, No3 etc) Do a few SMALL (5% volume) water changes per week.
Keep your fingers crossed.