Paypal won't let me remove my debit card

I worked for them. I've seen their list of error code reasons. Literally one of the error codes you could get was labelled as 'WTF happened?' on the list.
'Too many buckets' was another one, that one made me laugh tbh.
But they literally have like a 12+ page document of error codes and what they mean. The system is pretty buggy.
But generally our solution was, clear cache and cookies or try a different browser. It 75% of the time worked. If that didn't work, customer service could remove cards for you.

For me, PayPal said nothing until I called them. I made an expensive purchase via PayPal, they bounced it back with no notification that it was bounced back whatsoever, making it a headache for me and the seller. I had to make sure that it wasn't going out twice, which thankfully it didn't but the lack of an error message or anything was so unhelpful.

I just used my card straight-up after that. The card was under Visa, so it was subject to Visa's checks as well as the bank's own (where you can use SMS or app-based verification).