Neo-Stoicism as eudaemonistic is questionable certainly but ought eudaemonism be causally linked to virtue at all?
Relating eudaemonia to being a virtuous person may have arisen as the result of equivocation. It seems to be so for Aristotle where being good and doing good are linked as perhaps they should be. However he warps the connection by suggesting that the more good you can do the better person you will be. Ethics are propaduetic to Politics in his mind because in Politics the possibility to do great public good is enhanced. Doing more good means that you are more virtuous. The good life i.e. being successful is an indication that you are virtuous. Rhetorically it is because your Ethos is ample that you are trusted in the Polis. In Athens the concept of being a private citizen was tangential to your role as member of the polis with recurring public duties. In our time the family is the basic unit of society and we can regard the person who is of no public importance as having the same value ethically speaking as the politician. The struggling, debt ridden individual may be a good father or mother or friend and so forth.
For me there’s a whiff of success gospel about eudaemonism that repels.