I play 2m1sec bullet and have 785 rating. I think some of the games are good. I do have a timeproblem. Many games are so good that analyzeengine give caps score at 90 and above. Had a 97 yesterday, but there are also 30,40 and 50 scoring in some games. Fide longchess i have 1450 rating. I see a lot of good players rated below 1000 bullet.
I dont think <1000 can be good at any time control. Bullet will be much worse for them.
But whether your opponent is good or not also depend on your perception.
The problem is when there is 1000 vs 1000, one cant find and exploit his opponent weakness easily ( and he might think that his opponent might be good). The same to any level 2000 vs 2000 etc.That is why most people are stalled at those rating. But someone who can find the weakness of same level of opponents would become better rated player, 2500, 2800 etc.
And the CAP score is quite flaw, if you play open system opening with lots of tactical posibilities, your CAP score will be likely low( you will likely miss tactics)
If you play closed system such as stone wall, your CAP scores will be likely higher( less mobility----》less chance of tactics---》 less likely to miss tactics----》 higher CAP scores)
If you look at my games you will see an attacking agressive style, and when I get it right the caps can be in the nineties. Time is my huge problem in bullet 2+1, and I have problems both with seeing everything and actually move before the clock falls. Bullet is some fun games with lot of good moves , and its also timelosses and blunders. There are many players like me at around 800 bullet, players that have a quite ok chessunderstanding, but often fails in the hurry. The chess-skills at 800 bullet is very variable. Some are skilled and slow, and other not very skilled, but fast. I am reasonably good by my standards , and will become a mediocre longchessplayer maybe already this autumn. Last year I usually have been performing ca 1600 Fide otb, which is very close to average in my club Nordstrand. My conclusion is that there are a many good players at low chess.com bulletrating.
If you are referring to lichess, different rating system, or atleast used to be.
As to bullet it self, its just a game. If you want to be good play bullet not chess, when playing chess OTB is think a lot, tanking 40 minutes once, also a draw once every 10 games.
when i play bullet i try to win on time since that is the restiction we put on ourselves. play for the attack and rush pawns up the board they only have 1 min to react.