nominal interest for 3.5% on 1000 is 36.5, apy interest is 35.
I think you meant to say that a nominal interest rate of 3.5% compounded monthly is equivalent to an APY of (about) 3.65%. (I'll assume your math is correct, at least.)
Great, fabulous, that's fun. Now, back on Planet Earth, find a Singapore bank's 12+ month fixed deposit that compounds monthly, and that allows you to contribute pre-tax dollars that are then never taxed (at least by Singapore), and that provides net yields anywhere near CPF's yields, and you
might start to have a valid comparison. But there is no comparison. Traditional CPF provides superb yields.
Anyone want to complain that traditional CPF isn't providing a nominal interest rate of 8% compounded every minute? Good grief, this is silly, truly.
....And
nobody is forced to contribute to (high yielding, doubly tax favored) CPF, and never above $37,740/year (including employer contributions). Don't like that CPF "tyranny" (ahem)? No problem! Go work in any other country, or don't work. Then you'll have zero compulsory CPF contributions but still, incredibly, have the option of voluntary contributions. Not tyranny!
Singapore is less than 0.0005% of the total land area of the planet. Considering only land surface-based employment, over 99.9995% of the rest of the planet has jobs that don't require CPF contributions, if that's your thing. Go for it, if that's what you want. As long as you've done your NS time, nobody in Singapore is stopping you.