Anti-union sentiments (hell, or even just lack of support for unions) from a boss who claims to "care" about their workers is a dead giveaway that they're lying about how much they care.

Think about it, what they're basically saying is "I swear I care about you and will always prioritize my workers' wellbeing and happiess, but don't you dare actually hold me to that by forming an independent organization to oversee my commitment to what I just promised. Just trust that I won't put my own profit over your interests okay? I care about you so much that I absolutely need to retain all the power in our working relationship."