Hard to say. I feel tickets are really expensive in the UK, but I think they've not actually increased that much more than inflation - overall.I loved going to the theater as well, but when prices have doubled in less than 5 years, it's really hard to stomach it. When the Avengers came out, my siblings and I watched it close to a dozen times in theaters. Doing that today would be insanely expensive. I wasn't keen on watching Cap 4 in theaters, but my sister was quite excited for it for some reason.
Often things can go up a lot in a short time, but can also remain static for a long time, and they sort of balance out. I'm pretty sure a typical PC computer game (full AAA cost) was ~£30-35 from around 2000 all the way to around 2020. That's one hell of a long time for a price to remain effectively static.
Now it's gone up to ~£50-60, which seems like a big jump and feels really painful, but checking inflation, games are about the same real terms price as 20-25 years ago. And if it were not for the 20% or so decline in the value of the pound relative to the dollar (thanks, Brexit), it would probably be cheaper than 20-25 years ago.