I'll be real. I kept analyze why these two hate each other. The correlation between their life. Their career. The fandom. Everything. Overall, one thing remains. I think these two are too similar that they can't accept each other by the cells.
First, hear me out. FrosT and Termi are both innovators. They are someone who cooked something up. The "comp" designer. These two are different than analytical coaches such as Sliggy, Mini, or Jovi. The analytical coaches input are more significant in-game since they tends to directly affect the player while innovator coach are more focuses on the macro-stuffs.
Second, they are both blunt. If you are not new DRX fan you'll surely remember 2023's DRX. Then you have 2024 TLN. Too much changes. These guys don't care what is right but to do what they think is right. And it show in their interactions.
Third, they have same belief over the game. You can see both of them have similar gameplan, similar macros. Even their infamous timeout belief is the same.
You can even find more similarity. The more I looked, the more I realize they are similar person with different background. That difference create this inherent hatred for each other. Sometimes you don't like those who are too similar to you, and that led into what is now the beef.
Overall, I think it's ironic. Even if they hate each other to the bones, their team are the proof of each other's potential. That's why TLN or DRX fans can't exactly say their eternal enemy suck since they used too similar of a system, it'll mean your team suck too. That's why this beef will be legendary if continue.