It is impossible to recover a lost Bitcoin password, let alone crack it.
.... the best thing is to give it up and create a new wallet
Where did you get your information? Cause it is wrong...
It IS possible to brute force a bitcoin core password, there are even tools for this purpose (like the one i discussed in my first post in this thread, but there are others aswell).
What IS true is that, a lot of times, the time, hardware resources and energy needed to bruteforce a password are greater than your lifetime and/or more costly than the value of the unspent outputs in the wallet with the forgotten password.
EVERYTHING depends on the strength of the password and how much you still remember about it.
If you know, for a fact, your password is exactly 10 digits long (0-9), there are only 10,000,000,000 possible combinations... With a single GPU, btcrecover can try about 6000 keys/second, that's about ~20 days.
If you have a habit of only using lower case letters and never make a password more than 5 letters long, your searchspace is 26
5 (<12 million), which would take only little over a day.
If you know what passwords you might have been using, but you know you always used an incremental number at the end and you cannot remember wether or not your used a capital letter and you're unsure about one or two other letters that might have been replaced, the searchspace might be only a couple million, and you could potentially bruteforce this password in a couple of hours.
And btcrecover might not even be the best tool for the job....