I'm probably on my own, but I find the performative, unnatural and manufactured atmosphere that's taken hold of football in recent years really grating. Forced 'limbs' (hate the phrase) - who is genuinely throwing themselves about like they're in a ****ing mosh pit when their team scores a goal unless you're winning the league or a cup final? Oh and don't forget to have someone film it as well, so it can be uploaded to social media and everyone can say what good little fans we are. Letting off pyro to celebrate a scrappy 1-0 away win in the arse end of nowhere - it all just seems a bit desperate to me and seems to be much more about keeping up appearances than anything else. Maybe I'm just being a grumpy old ****er and these people are genuinely trying to make a better atmosphere at games, but none of it works as it doesn't (and can't) address the root cause.
Football atmosphere will remain stale or manufactured because a) young people and b) working class people are generally priced out of going to most games. The demographic is older/wealthier than it's ever been and that won't change any time soon - the older and the wealthier generally aren't going to generate that atmosphere. This article from Vice back in 2017 sums it up, if anything things have gotten worse since then - English 'atmosphere' at games is one of the biggest myths out there:
https://www.vice.com/en/article/53xwp8/squeezed-fans-silent-stadiums-the-myth-of-premier-league-atmosphere
That's the reason why home games are dead, and why away games have a good atmosphere - the people who naturally want to make that kind of atmosphere are in the minority, at home games you've got a mix of different fans, from fanatics, to fairweather fans, to tourists - at away games you've got the hardcore element. Almost every club up and down the country has the exact same issue. A few flags, or safe standing, or pyro or fake 'limbs' isn't going to change the fact that most game-attending fans don't want to/aren't naturally inclined to create that atmosphere.