They won't blame bitcoin for a Paypal problem, it's as silly as blaming the dollar or euro and the world financial system for disputed dollar/euro transactions and banking fraud, and fiat scams! They don't understand how any of those things work either, so why should they blame something they don't understand?
That's exactly why they would blame bitcoin, because they don't understand the basics. I do agree that is ridiculous, but that's what people do.
Basics of what? As far as average joe is concerned, there are just addresses and amounts of bitcoin to send, and possibly transaction fees in the form of "slow", "normal" and "fast" too.
It's different if you have customers on crypto exchanges blaming bitcoin for their transaction fee or key mismanagement woes, than customers of a company that is
not crypto centric such as PayPal, Venmo or Stripe having crypto transaction problems. Let me explain why.
The two groups advertise bitcoin as a different thing to people, the first group advertises bitcoin as a utility to make money and invest on, they even give their customers access to private keys and seed phrases (which is a good thing, don't get me wrong), but the more control over their bitcoins you give to people, the more likely they are to blame bitcoin for e.g the high tx fees that made a trade unprofitable, a forgotten username&password that caused them to lose their seed phrase too because they never wrote it down, things like that.
Now I'm not saying taking away people's control of their bitcoins is good, I'm just pointing out the correlation between control and blame.
By contrast, the second group advertises bitcoin as a method of payment, and (possibly) a means to exchange it to other currencies. Users don't have access to private keys or advanced fee handling and get a dumbed down version of bitcoin. IF some bug prevented USD <---> BTC exchanging from working (which is pretty much the only thing PP offers as of now), they are not going to blame bitcoin for the failure, they will blame PayPal, or X service, and flood their customer support.
(Addendum: newbies who are using software wallets are even more likely to blame bitcoin, because they are the sole managers of their money and not a company, and there is only themselves to blame for a mistake. Most people are unwilling to admit responsibility though, so naturally they try to find something else to blame.)
And while we're talking about control:
Yeah, and 98,7% of the people on Linux forums don't understand why people use windows macos
Fixed that for you. Contrary to what many people think, most non-tech savvy people in the US are using MacBooks and iPhones (I think even the Linux/Mac flamewars are bigger too.) And those devices give you almost zero control over the configuration, unlike Windows, yet the same concept applies here - They have a large userbase, while MS has less of a userbase that they can directly influence. Influence comes from selling the devices directly, or in the case of financial services, signing up the most customers on your own platform.