It would not reset any ladders, but the points (or whatever these numbers are) given or lost would be depended if a player is using Hax strategies or top-tier Pokémon, which lower the numbers winning and slightly increases losing if used and setted correctly, or using low-tiered Pokémon or original and non spammable strategies will increase winning and slightly lower losing points, and ragequitting (disconnecting and not returning after one of his/her Pokémon fainted) will gives a -50 to -150 penalties, depended on your current rank/ladder. Just a suggestion like anything else.
I doubt this sort of thing can be implemented because what is considered a "Hax strategy" is somewhat subjective, which Pokemon are considered "top-tier" would have to constantly be updated, and what you refer to as ragequitting, while annoying, could also occur if someone just had to leave mid-battle, and in that case the person would not be at all deserving of drastic ELO penalties like the ones you suggested.