Difference between Difficult and Frustrating

DIFFICULT vs FRUSTRATING: NOUN

Not easy; requiring great physical or mental effort to accomplish or comprehend or endure
Requiring considerable effort or skill; not easy to do or accomplish.
Not easy to endure; full of hardship or trouble; trying.
Not easy to comprehend, solve, or explain.
Not easy to please, satisfy, or manage.
Not easy to persuade or convince; stubborn.
Hard to do or to make; beset with difficulty; attended with labor, trouble, or pains; not easy; arduous.
Hard to manage or to please; not easily wrought upon; austere; stubborn.
Hard, not easy, requiring much effort
Hard to manage, uncooperative, troublesome; eg. said of a person, a horse, etc.
Hard to control
Requiring much effort and trouble

Not easy
To make difficult; impede.
To perplex; embarrass.
Not easy; requiring or dependent on effort; hard; troublesome; arduous.
Hard to do, perform, or overcome; attended with labor, pains, or opposition; laborious: as, a difficult undertaking.
Hard to please or satisfy; not compliant; unaccommodating; rigid; austere: as, a person of difficult temper.
Hard to persuade or induce; stubborn in yielding; obstinate as to opinion: as, he was difficult to convince.
Hard to understand or solve; perplexing; puzzling: as, a difficult passage in an author; a difficult question or problem.
Synonyms Difficult, Hard, Arduous (see arduous), laborious, toilsome; obscure, knotty.

Thorny, Trying, Unenviable, Delicate, Awkward, Rocky, Rough, Troublesome, Problematical, Arduous, Hard, Problematic, Challenging, Tough, Tricky

Painful, Annoying, Tedious, Distressing, Infuriating, Disappointing, Difficult, Preventive, Disheartening, Frustrative, Foiling, Preventative, Thwarting, Frustration, Discouraging

Thorny, Trying, Unenviable, Delicate, Awkward, Rocky, Rough, Troublesome, Problematical, Arduous, Hard, Problematic, Challenging, Tough, Tricky

Depressing, Painful, Annoying, Tedious, Distressing, Infuriating, Disappointing, Difficult, Preventive, Disheartening, Frustrative, Preventative, Thwarting, Frustration, Discouraging

It certainly can make for a difficult marriage.
Find it difficult to get around your bathroom?
Metaphors are more difficult to teach than similes.
Times have been so difficult in recent months.
The use of cryptography is complex and difficult.
Slow and difficult process to retrieve boarding pass.
Calamity player, pure summoner would be insanely difficult.
You are saying it is more difficult, music is more difficult?
Some dailies are more difficult than others, a lot more difficult.
Advancing racial equity is already difficult, but then you add the scope and it becomes more difficult.

Spiritual Industrial Complex and it is so frustrating.
It can be frustrating when functions stop working.
Frustrating, but in a pleasant sort of way.
Many of us know how frustrating that is.
It was very frustrating to say the least.
Plus, the constant electrical problems are extremely frustrating.
We truly understand how frustrating it can be.
Fi, which is increasingly frustrating given the new.
Developers often find them inflexible, frustrating, and costly.
Being the victim of medical malpractice is frustrating enough, but administrative slowdown will make matters more frustrating.