Started a forum right?
Can't stay above 1100
I've seen your game's portfolio. You're reaching easily ≈1200 in blitz but underperform in rapid 800+. Maybe you underestimate theory and favor "common sense" and "fast thinking" instead? Both are important in this game. My situation is vice-versa, better in rapid.

You just need to get better at chess. However, you are unlikely to get better at chess by playing exclusively speed chess. You would increase your chances of getting better at chess if you were to....
Play Longer Time Controls...
For many at the beginner-novice level, speed chess tends to be primarily an exercise in moving pieces around faster than your opponent while avoiding checkmate, in hopes that his/her clock runs out sooner than yours. And/or hoping to notice and exploit your opponent’s blunders while hoping they don't notice yours. The reason for this is that in speed chess there is little time to think about what you should be doing.
It makes sense that taking more time to think about what you should be doing would promote improvement in your chess skills and results. An effective way to improve your chess is therefore to play mostly longer time controls, including "daily" chess, so you have time to think about what you should be doing.
This is not to suggest that you should necessarily play exclusively slow or daily time controls, but they should be a significant percentage of your games, at least as much, if not more so than speed games which, while they may be fun, do almost nothing to promote an understanding of how to play the game well.
Here's what IM Jeremy Silman, well-known chess book author, has to say on the topic...
https://www.chess.com/article/view/longer-time-controls-are-more-instructive
And Dan Heisman, well-known chess teacher and chess book author…
https://web.archive.org/web/20140627052239/http:/www.chesscafe.com/text/heisman16.pdf
https://www.chess.com/blog/RussBell/dan-heisman-resources
and the experience of a FIDE Master...
https://www.chess.com/forum/view/general/how-blitz-and-bullet-rotted-my-brain-don-t-let-it-rot-yours
Learn what you should be doing...
Improving Your Chess - Resources for Beginners and Beyond
https://www.chess.com/blog/RussBell/improving-your-chess-resources-for-beginners-and-beyond
https://www.chess.com/blog/RussBell

Always the under dog what...
I'm guessing the server malfunctioned, since the same comment appears twice in a row.

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