If you want to use state of the art password cracking: https://hashcat.net/hashcat/
On a lark, I tried to crack my own WPA key for my local network. Captured the handshake, downloaded some wordlists, started it. I have an older CPU and graphics card, i7 4930k + GTX 1060.
Some regular CPU based method, I ran the numbers and figured it would take a bit over a week. Ran it for a day, and then decided to see if something better was available.
Read about Hashcat, gave it a go, and it finished in 90 minutes. At first, I thought I made a mistake and it crapped out, but nope! It cracked it. It was done. 90 minutes on modest hardware. Imagine if you invested some real money in it with a modern system!
If it's brute force that's astounding.
Is your password that bad or did it have some really good mangling going on.
There are 100,000 alphanumeric (including caps) 8-character passwords.
https://nordpass.com/most-common-passwords-list/
Which is why there are Identity and Access Management (IAM) and Privileged Account Management (PAM) solutions that help protect against a users own laziness.
That means that a rainbow table that covers the most common WPA2 SSID names could offer an instant solution, and narrow the search space if no solution is found.
Honestly if I hear someone in infosec start talking about rainbow tables in 2022, that's a good indicator that they have not cracked passwords in a long time, or they are just regurgitating what they learned to pass some basic security cert. Hashcat on a modern GPU is blazingly fast, and barring some really niche edge case, your best bet is just going to involve throwing more GPUs at the problem.