Losing 53-20 while having 3 tanks, and going up against a team that built all damage on all 5 champs is disheartening.
You cannot build against damage types and succeed. There is so much damage in the game that reducing damage intake isn't effective enough. You have SO much damage in the game, that with all this overkill damage in someone's kit (and grouped up peoples' kits), resists still leave you with, well .... less overkill damage. You gotta lower the damage in the game so that tanks, lifesteal builds, on-hit builds ... they could all come back. The overkill in the engagements is too much, and so many strategies are dead now to the zergs people do.