My timeout burns for my opponents actions
During a game of historic, my opponent had Scurry Oak; Heliod, Sun-Crowned; and Soul Warden. Causing him to have a bunch of squirrels, and a bunch of counters on everything.
When he passed to my turn, I was ready to go off and win that turn. However, when I played my creature, his loop started with Soul Warden triggering. Which is expected, there is no problem there.
The problem is, as he was triggering and resolving his loop dozens of times, MY timer was the one burning out. So by the time he was done, the computer forced me to pass.
TLDR:
The problem is not the combo itself, the problem is MY timer was burning out for my OPPONENTS actions during my turn.

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FlatMoonTheorist#12898 commented
After a lengthy game and after me casting a fog spell, my opponent combo'd off with the scurry oak combo; infinite squirrels and infinite lifegain. They manually set about 50 triggers, eventually timed out, then everything else still had to resolve, which took about 10 minutes. I had no possible responses; no spells I could cast or abilities to trigger, nothing. The triggers finally end, my turn rolls around, and I immediately lose. This is the worst possible feel-bad moment this game could produce. I feel like I'm being punished for my opponent's griefing.
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Anarasha#15974 commented
I was playing against a person using a token lifegain deck.
Long story short, this person got "Leonin Warleader", "Rabble Rousing", "Ojer Taq, Deepest Foundation", "Soul Warden", "Ajani's Welcome" and "Voice of the Blessed" on the field.
I had Soul Warden on the field.
This caused the opponent to create a MASSIVE amount of tokens, causing my Soul Warden to trigger, their Soul Warden, their Ajani's Welcome and their Voice of the Blessed.
The combo was hundreds of steps long.
I had no priority as I had no mana open and nothing that didn't need mana to tap.Neither of us were actively doing anything while the combo resolved, they had no mana or tap abilities open either, so the priority was automatically passing as there were no actions to take.
The combo started to resolve the many, many, MANY steps, and then my timeout started to get used. My timeout. On a combo my opponent played. And it used MY TIMEOUT.
This kept going until I had no timeouts left at which point the game conceded for me because I was "inactive".
In other words, my opponent played an impossibly long combo, the game used my timeout and then I lost the game because my opponent's combo was impossibly long.