Ask HN: Is it just me or has the Gmail spam filter stopped working?

In the past year or so, but picking up in the past six months, there has been a noticeable amount of email allowed through to my inbox that is obviously spam.

By "obviously" I mean I can clearly tell at first glance that it is spam. It's not any sender I'm subscribed to and there are all caps and random offers that you'd normally expect when clicking into your spam folder.

On top of that, there are senders who I had subscribed to at some point, to join a store's member club, etc. that I no longer was interested in receiving mail from and reported spam and unsubscribed and I still receive mail from them. There is one store in particular that I have now reported as spam at least three times and it still comes into my inbox.

Is this a function of just too much mail to process or is there some other reason for the uptick? In years past I don't recall ever seeing spam and if I did it was few and far between. Now it's probably 30% of my daily mail.