I'm always impressed with Housemarque's ability to design a game that immediately seem impossible, but allows you to slowly develop your skills to make the impossible achievable.
Resogun was similar. At launch I was happy to just beat arcade mode, and gave up hope at ever platinuming it. It wasn't until I went back earlier this year that I was able to persevere and get the platinum, which didn't even seem that tough.
In Nex Machina, with my first Arcade run, which I did on Experienced difficulty, I had some hiccups. Learning a few of the later bosses consumed a few continues and the last boss destroyed me. By the time I got to the last boss I had about 60 credits left, and he whittled them all the way down until I beat him with 9 left. Without all the moves in my repertoire, I had almost abandoned hope.
I immediately thought an Experienced 1CC run would be impossible.
But after some more time with Arena mode and a 1CC run of Rookie, I tried Experienced again... and somehow breezed through most of it! I got all the way to 6-7, used 3 quick continues trying to get back on my feet, and beat the boss on my first try (thanks to having upgrades).
A Experienced 1CC run has went from impossible to attainable in 24 hours. Hopefully the other seemingly impossible stuff starts to feel attainable after I slay Experienced.
Still, the game is very unforgiving if you use a continue. It's tough to go from having everything at your disposal and a max powered weapon, to having absolutely nothing.