Make nades weight at least 6kg each and problem solved (KilluaKom youtube video)
I think limiting the nades per raid is dumb, but, this has to be nerfed, just make them weight 5-6 kg each, noone is going to bring more than 4-5 nades per raid (20 per team is insane still)
You want to spam nades? cool, youre in a huge disadvantage from the beggining