So, okay, here's the thing...
There's nothing, canonically, which says that Claire is like, totally good. People are very quick to say things like "Johnny ruined this woman" or "Claire deserves better", but I had the thought a while back of like... What if she doesn't?
There is a version where Claire didn't necessarily follow a straight path from college to when we see her in the show, and we wouldn't know, because the show really tells us nothing about Claire beyond the fact that she married Johnny and they have kids and dog.
Folks like to assume Johnny was doing all his big bullshit and villainy more or less under cover in the sense that Claire was probably none the wiser to any of it, but there's just as little information presented to support that as there is to oppose it.
At the end of the day, she married Johnny Worthington and like, assuming this is because she knows him very intimately, I think that in itself clearly suggests some flaws in her judgement, if not her very character.
Because Johnny notoriously seems to try to completely surround himself with those who idolize him and they do not question his shit, and those who are, themselves, similar to Johnny and, likewise, tend to agree with him on most (if not all) things and are therefore about as unlikely to bring about any trouble for him.
So, there's probably something about Claire for which she fits somewhere within those two categories, or at least closely to. Because it's also the case that Johnny really didn't seem to grow or change much, in terms of his character, after college.
At least for me, it's hard to imagine Johnny voluntarily sharing his life with someone, especially on a close and intimate level, who has strong morals at least enough so to such that it's considerably possible they will not be happy about his (bigger) choices, to the extent that, perhaps, they are liable to be inclined to oppose him or be in his way at some point or another.
If nothing else? There is something about Claire that Johnny not only accepted but loved her for, and all of what we know about who Johnny is tells us that it's most likely not a good something, at least morally speaking.