It is the first time that I hear complaints about Coinbase. I don't want to question the validity of these reports, but this does not mean fraud or scam.
Also, I do not know why you are linking between regulations and these complaints ?. "Everything has its pros and cons."
I do not know how many transactions performed by Coinbase, but perhaps 134 pages is a small number compared to the entire system.
Seriously? There are thousands of complaints about Coinbase and you can find a lot here on the forum. It's not something new. Coinbase is famous for having one of the worst customers support in the crypto exchanges. And it's like this before the company becomes regulated.
I am not surprised if the authorities are starting to look closely about the complaints