struggling with self-worth, competition and mental health

its been a while, I don't feel like looking forward to anything rn it just has been incredibly stagnant for the past year or so. background - in one of the good institutes of the country, decently good with acads but failed to qualify for good programs for exposure, yes there are people smarter than me but most of time my hardwork never seem to materialise there have been times where I missed by a short margin and others where I qualified but rejected due some other non - meritocratic anomaly. Love and social life is screwed as well.. did find good friends in 1st year but soon either outgrew them or they drifted apart.. feeling so stuck and stagnant that I don't see anything good or exciting in the future and kinda lost every bit of confidence that I had in myself...need advice