I don't know what "hard leetcodes" look like... even in my teens I failed to solve _some_ problems. But what I can tell you is that I switched jobs less than a year ago, I was given as part of the interview process a link to solve 3 problems online in 1h30m and solved them all in 1h. Now, were they rated "hard"? I don't know, honestly.

Also, 2years ago (I think) I participated in Amazon TechO(n) challenge... I was 1st after the weekend, but couldn't work on it during the week (no time/ kids) so by Friday my solution ended up 5th or 6th I think.

[ninja edit] No, I'm not faster, I'm a lot slower. In fact I probably lost most of my speed in the first few years when I stopped competing... but it's not a linear function, at some point, you don't lose any more speed; and just a quick refresher every now and then can boost your abilities back to fairly high levels. And most interview problems are not really competition problems, they're fairly basic.

And no, I don't write algorithms from scratch currently, the company I work for might actually be characterized as "boring" by many people("robotic process automation" - look it up). But I've lived to learn that when there's lots of money involved, there's also lots of interesting problems to solve - one just needs to find them.