And getting 0 mythics. Because it doesn't feel like it should be possible, but now I don't even wanna play the season anymore.

Each kill has 7.5% chance of getting a mythic.

So the probability of not getting a mythic each kill is 100% - 7.5% = 92.5%

Now since you have killed it 60 times:

92.5% = 0.93%

What Is The Probability Of Running 60 Torm Bosses. And getting 0 mythics? 0.93%

Feel your pain, ran through waves of mats, felt like at least 30 torm bosses and 0 myths, had to make a new char and push the mothers gift to get a spark to craft my 1st mythic. After crafting it and going back to my main, 2 torm runs later I find my 1st mythic, and ofc its the one I crafted from the sparks... acquiring the 1st 2 mythics feels bad, they only give you 3/4 sparks on purpose..