What is Missing?

Once, twice, thrice,
Until when could this end?
I’d been in and out
But bitter is still what it tastes in the end.
Why can’t I get the best tasting ending?
Where can I get that one of a kind ingredient?
Should I deal with it like a Math problem?
Where is the given formula?
What am I missing?
When can I get that best equation ever?
How many scratch paper should I tear?
How many recipe should I burn and put to waste?
Sometimes, I just get tired.
And wanted to curl up and cry.
Ever since, keep asking why.
Haven’t found the best answer to thy.