I really dislike the nu-therapy psuedo-scientific truisms that people repeat these days about "self-care" and prioritizing oneself over everyone else, encouraging people to entirely cut-out anyone from their life that causes any kind of emotional turmoil or stress. While it's true you don't want to be involved with legitimately abusive people, there is a scourge of people just diagnosing everyone around them with psychological/therapy terms like "narcissist" and then justifying that to excise their family members, friends and co-workers from their lives. This alienates and isolates not only the person being cut off, but the person doing the cutting off. Estrangement should be a last resort for legitimately violent or abusive individuals, but instead it's become the first resort of everyone as we withdraw into ourselves.

You can see this trend clearly in younger people who prefer to "ghost" friends, family, lovers, etc. over a formal break-off, or continued relationship with different boundaries. Any time anything gets uncomfortable, the default is to just cut it off and move on without any consideration of what that does to them or to oneself to treat humans so callously and in such a transactional, clinical manner.

Humans are social creatures and we require others to have proper dialectics. Once we withdraw into ourselves we spiral instead of move forward, with no other party to be on the other end of the dialectic. People have been conditioned to believe that if there is any pushback against them whatsoever, even pushback that is valid and helpful, then the solution is to excise that pressure to exist in some sort of vacuum instead of working through it to emerge better off for it.

In my experience, the best "self care" is care for others which is then reciprocated. It feels good to be wanted, loved, esteemed. It feels good to give that to others. It doesn't feel so good to wallow in my own mind, in my own problems. That only leads towards unhealthy behaviors like abuse of substances, consumerism, etc to try and fill the gap which is what usually ends up being the so-called "self care"