let (someone) down

to disappoint someone, usually by not doing something.

I know it's silly, but I feel like everyone lets me down when I really need help.

• in the same league as something
• in the scheme of things
• in the shadow of
• in the shadow of someone
• in the shadow of something
• in the short run
• in the short term
• in the soup
• in the strictest confidence
• in the strict sense
• in the teeth of
• in the teeth of something
• in the thick of it
• in the toilet
• in the twinkling of an eye
• in the vicinity of
• in the vicinity of something
• in the wake of
• in the wake of something
• in the way
• in the way of
• in the way of something
• in the wilderness
• in the wind
• in the wings