Stop playing blitz. Stop playing bullet. Start playing about 10 online games at once and take the time to really really think about what you're doing before you move. Use the analysis feature to move the pieces around.
When you do play live, play at least a 15 minute time control.
Use the explore feature here to look at dozens, hundreds, thousands of master games and try to figure out why they did what they did.
Repeat the above endlessly.
Can someone please tell me how to be higher rated and be better at chess?