Well, the code you provided actually counts how many of each char there was. But nvm, it's fine.

i thought that kumite is trying to find max value in a string...was my idea

What does this have to do with this kumite? :/

let s = 'lollipooooop';
var result = [...s].reduce((a, e) => {
a[e] = a[e] ? a[e] + 1 : 1;
return a
}, {});
console.log(result);

Mark your post as having spoiler content next time. Read the kata description again, you only need to change one letter.