I live in Newcastle BTW, which is assuming where you are from. Both fights were witnessed at Newcastle train station following a home match.
The question is on AIBU. I believe to show anger that impacts on others after a football match to be unreasonable.
If I've had a bad day at work I wouldn't stomp around the house. My partner is a massive competitive gamer, often does it for money too, if he loses, it bothers him, but he has enough respect for me to not let it have an impact on my day, he can quietly stew in his rage if he likes.
A close relative is a professional footballer, when he loses he pulls his face a bit, says oh well that's a shame and moves on with his day.
You described feeling subdued and not in the mood for a drink, not stomping around. Most of what you described seemed related to the time and effort to see the match, which was a let down, to feel subdued is proportionate to that experience. To feel anger and to let it interfere with the moods of people around you, is not proportionate. That is my opinion, I am not an expert on what is justified and what isn't.
Anger, stomping and being very pissed off is uncomfortable or even intimidating to be around, even if it's to a significantly lesser degree than "hitting his wife with a frying pan" - which I did not insinuate by the way is what happened to the OP. The thread title asked about football affecting mood, I gave an extreme reaction, which as I said, is not uncommon.