Subjective group relative deprivation (SGRD) is a powerful driver of political protest and support for radical parties. Yet, we lack insights into whether such subjective perceptions of disadvantage attack the very core of democratic legitimacy, that is, citizens’ support for democracy. Against this backdrop, we investigate how SGRD relates to diffuse democratic support. We argue that perceptions of being systematically disadvantaged fuel disaffection with and resentment against the prevailing democratic system, whereas authoritarian systems with their strongmen leadership appear appealing as they promise a stronger in-group protection and pursue more confrontational in-group-out-group relations, which both can be understood as coping strategies to overcome an unfair disadvantage. Employing original – cross-sectional and panel – survey data, we show that SGRD has the potential to undermine citizens’ support for democracy across six European countries in 2020–2022. Our study highlights the negative impact of subjective disadvantage on support for democracy by combining literature from political psychology and political economy.