look at the original poster boy of incel: Roger Elliot. he was physically attractive, well groomed, from decent money, clearly looked after himself but was one of the most unattractive personalities and complained he was constantly rejected.
You can still be well groomed and the biggest incel. that’s often their complaint against women. They are relying on getting by on looks alone and then complain about getting nothing because they overlooked women are deeper than that. They don’t wanna work on themselves. Easier to blame the women or society or feminism etc.
There are plenty of men who don’t even have half the physical attractiveness of Roger Elliot and far more well adjusted.