Strengths: active play and endgame skill
You clearly know how to play dynamic positions. In your win against niceguy5-scratch, you played the Grunfeld Defense well, handled the complex middlegame nicely, traded down to a better endgame, and then used your king actively to keep the pressure on until your opponent's clock ran out. You also showed strong technique in your second game against the same opponent, where you converted a passed pawn in the Bird Opening into a winning attack with two queens. These games show that when you have an advantage, you are hard to stop.
Time pressure and loose pieces
The most obvious area for improvement is what happens when the clock gets tight. In this loss, you were facing KF3WIN. You were already slightly worse, but the game slipped away when your queen moved to a square where it could be captured by a knight. In a one minute game, time pressure always makes these Loose piece moments more likely. The fix is to build a quick habit before moving your queen: scan the enemy knights and bishops for any safe capture. Even half a second of checking can save the game.
Bird Opening and pawn storms
Your other loss, this game against lordmoney123, also showed a pattern to fix. Playing the Bird Opening as White, your opponent's early pawn breaks in the center forced you into an uncomfortable position. Once your bishop on d3 became a target, you tried to keep it but ended up losing material and then the game. In the Bird, it is often safer to keep the light squared bishop away from d3 when Black can push central pawns. Consider developing it to e2 or g2, or meeting ...e5 with a solid central setup so you are not improvising later.
Actionable next steps
- Before moving your queen in bullet games, spend a fraction of a second checking if an enemy piece can capture it. This can prevent the worst time pressure blunders.
- When playing the Bird Opening as White, have a response ready for ...e5. Keep your bishop on e2 or g2 so it is not an easy target for a pawn storm.
- Keep playing the Grunfeld Defense as a solid weapon. Your counterplay and feel for active pieces are big assets in that opening.
- Practice converting winning endgames like the ones you produced in your wins. Your king activity and passed pawn technique are strong, and even more endgame study will make those wins faster and more reliable.