Spyro Reignited Trilogy is the only new game I've got this year and I'm kinda disappointed with it. :')
The third game is a broken mess and I think I've been locked out of 100% completion because one of the stages gave me 404/400 gems... like, it went over the limit which I'm pretty sure isn't supposed to happen?
Also I don't remember Spyro 1 being next to impossible to complete. I tried like ten times in a row to get to the locked chest in Dry Canyon but I just missed the ledge every time and I have no idea what I'm doing wrong.
There are people who have already got the platinum trophies for all three games, yet here I am struggling to finish them properly due to bugs. :/
I asked my brother because his knowledge of all things Spyro is sorta creepy vast, but he said there's a known bug that happens if you've got 100% complete for the gem collection and then get the final dragon. I'm not sure if that's the problem you had, but either way, bugs like that suck. I played Ni no Kuni 2 when it first came out and there were some issues, like how you couldn't recruit a certain character before another one or it would prevent you from ever recruiting that second one. Luckily they starting patching things, hopefully they do the same for Spyro.
I also know he mentioned that the third game was done by the developer's B team, where as the first and second were done with more love and care. So... that could be why it's janky. I watched him play a little bit and it was kind of sad how the re-dub doesn't capture the silliness of the original.