Making your own works fine, even if it's a simple "type these words". On HN I see enough articles about breaking reCAPTCHAs with (claimed) 90% accuracy and I know spammers also employ humans. You can't make the perfect CAPTCHA, but anything custom will almost certainly do. For smaller sites it's also perfectly fine to just include a few "are you humans?" type questions to which people should reply "yes" or some other obvious answer. Having to spend development effort just to flood you with messages is probably not worth it. You will still get the one-off message when the CAPTCHA was solved by a poor worker anyway.
My knowledge is a year or two out of date (haven't hosted forms in popular websites anymore), but it doesn't seem like this could have changed that rapidly. Bots don't suddenly understand English, and neural nets aren't much better or worse at word CAPTCHAs than picture CAPTCHAs. It's just that Google didn't need books anymore.
I do still host a bug report form on a smaller site, and that just filters <a href, and more recently, http://. If someone enters that, the site gives the helpful message that http is not allowed for spam reasons and they should use hxxp:// instead and that I'll understand what they meant. Haven't gotten any spam since I started including that.
The cases where reCAPTCHA is a good idea are really rare. Logins can be solved with exponential back-off, forms can use spam filters similar to email and a simple CAPTCHA to catch the vast majority. With reCAPTCHA, I often spend minutes solving the because Google has no other markers to go on (deleting cookies, localstorage). I used to not mind them when other people were all complaining about those word CAPTCHAs (I found them easy) but now reCAPTCHA just take your time instead of your reading skills and they're absolutely awful. It rewards not using privacy technologies in your browser and so a lot of laymen don't experience the issues. Please don't use reCAPTCHA if at all possible...