I have read on many websites that Good luck finding a new job is sarcastic and not a well-intentioned wish.
How do I make it well-intentioned and still use finding?
I have read on many websites that Good luck finding a new job is sarcastic and not a well-intentioned wish.
How do I make it well-intentioned and still use finding?
I don't think 'Good luck finding a new job' is necessarily sarcastic and not a well-intentioned wish.
As @Michael Harvey rightly said. It depends on the situation and our tone.
Some interpretations may just be taking this informal definition of "good luck" with no bad intention.
2 informal → used to say that one thinks what someone is trying to do is difficult or impossible
Sense 1 of this dictionary says
1 → used to say that one hopes someone will succeed
How your message will be interpreted has nothing to do with the gerund-participle finding.
I believe if we convey our goodwill sincerely, the listener would not misunderstand.
Edit
I prefer Good luck with your job search which has many more hits. Good luck with finding a new job is fine too.
"Good luck finding a new job" can indeed be read as sarcastic. By itself, that's probably how it will be read.
"I was so happy to work with you. You taught me more than anyone else and I was devastated to learn you were leaving. Thank you for everything. Good luck finding a new job!" ...will generally read as sincere, unless the first part is blatantly false.
If you are concerned about coming across as sarcastic, add a little bit more language to indicate that you are sincere.
I'm going to disagree with most of the answers here. It's hard to imagine a context where "good luck finding a new job" doesn't have a negative tinge to it. There's something idiomatic about this phrase, at least to me. If could be where I am from, my age group, or something like that. I would never say that to someone. There's too much risk it will be taken as a 'dig'.
I don't know how to explain it exactly, but if you say:
Good luck finding your next job/role
It feels unambiguously supportive. I think it's the implicit assertion that the subject will find a new job.
Frame challenge: "...finding a new job" is the problem. I'd replace with "Best wishes for your future". I'd also avoid email is at all possible, as your way of speaking says more: sound sincere.
The other answers at this point in time1 have largely not addressed the formal requirement of keeping2 the gerund "finding". So, to that end:
Finding a new job can be challenging in these hard times, but I absolutely wish you the best of luck in your endeavors.
1 I hate that phrase.
2 I worked in a second gerund.
"Good luck finding a new job" isn't always, or even usually, sarcastic. It's very context dependent. If the person you are writing to knows you as someone who wishes them well, and everything else you write is positive, you don't need to worry that they are going to take it as sarcastic.
In the absence of context the easiest way to remove any possibility of misunderstanding is to add a personal subject.
I wish you the best of luck finding a new job
is very unlikely to be taken as sarcasm.
I would just say ;
"Best wishes for your future endeavours."
It is not necessary the person would be doing another job, maybe he want to take a break, or maybe create his own business or write a book or take an early retirement.
Best of luck finding a new job.
Best of luck with your job search.
I have never heard "best of luck" used sarcastically.
P.S. In American English