Don't give more importance to Ranked because it is not worth it... The fun of street fighter in part comes from improving at it and playing ~10 matches consecutively against a player in lounge is the best way to do it...
It's a
valid complaint that the ranked is not working as promised but you
DO have an alternative (unlike me) to enjoy the game. You don't need a bunch of numbers and letters or grade to make you feel good at the game...
Don't think learning a high damage combo would help you get better at the game if you can't create an opportunity to land it in the first place... First improve your fundamentals and then go from there...
If you have time then watch a SFIV match of Alex Valle and Daigo Umehara... It is a good example of two world level players playing the game just using normals and fireballs... No high damaging combos, no throw setups, no frame traps, nothing. Just wholesome, clean SF fun...