I can only confirm what other already said, adding that recaptcha seems completely broken for many people right now.
From the same static and non-shared IP, I have completely different trust scores in the morning than in the afternoon. I see different trust scores between Chrome and Firefox. Even worse, when I’m logged into my Google account, 4 out of 5 times I have a terrible trust score (making it nearly impossible to complete the captcha), while I am more trusted when I’m not logged into the Google Account (where I’m registered with all my personal data, including verified credit cards). And yes, I mean it that way, not the other way around (which would be logical for a captcha service).
You can check out this link to see the current trust score:
Try with different browsers and with/without Google Account login.
I used to use the Incognito mode of my browser to avoid having to logout from my Google Account, for the sake of solving recaptchas. I now switched to Firefox with Multi Container to restrict Google/Facebook accounts from interfering in other websites, so I don’t need that any longer.
Recaptcha Googleforums and support are basically useless, no one relevant ever responds to any problems.
And no, the IP space I am using is not in any way dirty or blacklisted, it is a completely clean RIPE assigned IP subnet (I am a senior network engineer with that LIR). It’s not new either. And I can see people all over the place having the same problems, even outside of this network.
It is my strong opinion that recaptcha has become a totally unreliable service. That’s unusual for a Google service, but it is what it is.