I was roughly 5-7 while using it. Maybe it wasn't that bad and I was simply impatient. Regardless, it's always been useless to me.
I have never once found an answer in an F1 help in a Microsoft product. And I've been using Windows since 3.0.
On a somewhat related note: Before wiki's, google, and stackoverflow became the norm, I used to love downloading CHM (compiled help files) references for HTML 3.x, Javascript, C/C++, and more.
Really helped out a young kid figure out how to write autoexec.bat/config.sys files so that his games could run. Being able to write menus so I could customize my setup for each game was so amazing.
With the advent of the internet the quality of on-system help documentation has stagnated.
Then it became uselessly slow.
Despite for some reason having very good SEO, searches that land you there nearly always involve the same pattern. An MVP restates the question. Then they suggest running an irrelevant command, such as "sfc /scannow". Then when it doesn't help they suggest taking the issue somewhere else. It's not hyperbolic to suggest you could replace hundreds of MVPs with a bot and noone would notice.
The lack of moderation means common searches land you on threads - on a Microsoft subdomain - full of nothing but bagging out Microsoft and swearing at the state of things.
I mean I get that for a resources constrained company it can be hard to do better, and I wouldn't fault small businesses. But given this shows up for just about every Google search relating to Microsoft, you'd think there'd be marketing value in fixing it.
Of course now it searches done Windows live forum or something and is 100% useless.
Windows, Office, Visual C++ help are all God-awful now. As a few have said, much better just to Google search and lunge for Stack Overflow.
Keep in mind that the Windows help system (and F1 as a shortcut for the same) dates back to when Internet was not a given - heck, TCP was not a given.
Now that I think about it, I actually wonder when F1=help became a thing. I distinctly recall a lot of DOS software already using it - e.g. Norton Commander had help on F1 since v1.0, and that shipped in 1986.
Every year it becomes harder and hard to work on machines that aren't 24/7 connected to the internet. My favorite is when people say "oh, there is this webservice we need you to deploy" and I look and it is written in node.js and has about a billion dependencies, each one of which will require its own waiver and approval.