my question

i have been going back and forth from 400 elo to 700elo quite a few times now due to my inconsistency , but i always realize beating 500 elo is harder than 600 elo , i also noticed 500 elo dont resign whereas 600s and 700s do , why do you think that is ? 

@1

"my inconsistency"
++ Blunder check before you move. That little mental discipline alone is enough to reach 1500.

"500 elo dont resign whereas 600s and 700s do"
++ 600-700 have learned it makes no sense to play on a queen down, 500 not yet.

<1000 Elo chess has so much chaos that randomness is often more important than a few hundred points of Elo. Eliminate hanging pieces and not seeing when opponents hanging pieces you'll quickly get out of this rating range.

I'm actually surprised to hear lower Elo not resigning because I always see the opposite, low rated players quiting games after the very first blunder, contributing their low Elo. Recently saw someone on here that was resigning after having their pawns doubled. <1000 Elo stalemate, timeout, and blundering mate in 1 is always possible so you should only resign when you getting ladder mated. Although if you don't enjoy playing lost positions I won't knock resigning for that reason.

Players rated around 600 or 700 Elo may have a better understanding of basic chess principles and strategies compared to those rated around 500 Elo. They may make fewer blunders and have a better grasp of tactical and positional ideas, making them slightly easier opponents to defeat.