I would recommend trying to play other shmups, they may be frustrating but the mental exercise they provide can be more rewarding, more fun. Recommendations:
- Battle Garegga (if you get good enough, you'll start using specific option formations and bomb sceneries/enemies for score, besides chaining medals and dodging bullets. It's an exercise in how to maintain control over a game)
- Dodonpachi (helps you maintain control over the stage, and the enemies, so that you're not ultimately cornered and forced to bomb. Also another game that exercises control over the situation, before you can try to play for score. Oh, you'll also feel much more awake if you try to maintain the Maximum Bombs bonus)
- ESP Ra.De (yet another good game that allows you to think and try to manage the stages)
- Giga Wing (the bosses will become more difficult later, but the stages allow you to charge the Reflect Barrier on anticipation, and to use the bombs on reaction, if needed)
- Varth (a game that has enemies coming from behind, and enemies that flat out shot gun you, mercilessly. But if you get used to them, the bombing mechanic and the item pickup invulnerability, the game feels enjoyable, exciting, it demands your attention to stay alive, and the BGM helps too!)
I'd say Raiden Fighters Jet and Thunder Dragon 2 as well.. (out of ideas for now, and must go eat now
)