Yeah I know.
As I said, what makes frozen really strong isn't just the description of the set affix but the combined frostbiting. Think about it like this, if you have 300% frostbiting , your attack is effectively 4× stronger . Then when your attack explodes with frozen, the dmg is multiplied by 1.25 but the explosion is also multiplied by 300% frostbiting and then if the frozen happens twice, this 300% boost happens 3 times .
For example you deal 1 billion dmg . This is multiplied by 4 so 4 billion dmg. Then the explosion happens so 4 billion × 1.25= 5 billion dmg. Then the explosion is effected by frostbiting as soon as it places frozen on other enemies so 5 billion ×4 = 20 billion. This is if one explosion happens and 1 enemy but there are many variables because if multiples of enemies are frozen at the same time, technically many enemies effected by frostbiting can increase one explosion by a huge amount as well as the 1.25× dmg per enemies frozen.
One frozen explosion and multiple enemies frozen. About say 20. 1 billion increased by 300% frostbiting to 4 billion. Then the frozen explosion happens and if 20 enemies frozen , it means 1.25×20= ×25 dmg. 4 billion dmg ×25= 100B dmg. Then kicks in frostbiting or two. This could turn into 8 Trillion dmg or much much more. The crit dmg is constantly spiking up the frozen dmg to be honest as each frozen has a chance to trigger crit or no crit. If one frozen did crit, the other frozen may not do crit but it does innately more dmg than if 2 frozen exploded without any crit to happen. As well as that, these values get multiplied by frostbiting. Also if two frozen exploded with crit, both will be very high Dmg and very much spiked up by a huge amount.
If one frozen did deadly strike though, the next frozen will be 1.25× stronger or more than that previous deadly strike and it could continue a massive chain to easily get absurd numbers and as well as frostbiting. Also if enemies have stack debuff at first before the ice attack touches them, it make huge difference in dmg calculation of frozen which is essentially smart hirling play to deal extra dmg. Also Arcanist and Ascendant lifts it to absurd values too never seen before.
100B dmg ×4= 400B dmg or because of multiples of enemies effected, technically it would be ×4 about 20 times. Or 20 frostbiting kick in. Spike dmg due to frostbiting. Also crit chances/ deadly strikes can very much effect this value my a huge mile but this is assuming the 1B dmg is non crit as well as many explosions as an example. This is also why brutal mythic is extremely strong with frozen.
Also if deadly strikes or crits happen and even Arcanist+ Ascendant this can bump the values to a crazy insane dmg. Feels gud to deal quintillion dmg lol. Of course crushing blow does help sometimes.
Plagued used to proc toxic cloud multiple times when it wasn't supposed to and it had inner crit dmg as well which made it all the more with absurd high Dmg. Think about this. If you dealt 1B dmg and you have 300% blight and effect 20 enemies, you essentially dealt 100B dmg. Crit dmg spikes many times if blight already spiked it up much and if toxic cloud proced twice, this could let you deal easy quintillion to numbers with 27 zeros back when green garden was broken. If you could spam coat at that time, toxic cloud could proc many many times and it also did that anyways along with the innate crit dmg constantly multiplying with deadly strike and crit dmg.
This is why it was so popular and also had numbers covering up the screen by 60% or 40%. It used to be far stronger than frozen but now they're about almost equal power and extremely powerful if combined correctly.