Some issues with my system

I’ve been noticing something kinda weird trading SPX/SPY options lately

Sometimes everything lines up structure looks good direction makes sense, whole setup feels clean but the trade either doesn’t fill,fills late or I only get a partial before it runs and those are almost always the ones that would’ve been big winners

but then the trades that fill instantly… those end up being way worse on average lowkey feels like: good trades are hard to get filled bad trades are easy

not sure if I’m just bugging or if there’s actually something structural going on with liquidity / fills

anyone else have experience with this