Tony Hawk 5 was a failure because Activision realized that they were still sitting on the THPS license and it was going to expire. So they pumped out a game in like 6 months before the license expired. That’s why the disk only contained the tutorial level and you had to do a 50 GB download after installing to get the rest of the game.
They had no intention to make THPS 5 a good game - they only wanted to make a cheap cash grab before they lost the rights to the THPS license. And the best part? They legally can’t do another printing of the game containing all the content so everyone’s stuck with just the tutorial level when Activision eventually shuts down the THPS servers.