Javascript if statements wont work

hello if I chain my if statements like this

    if (b4 < y2 || y1 > b4 || r4 < x2 || x4 > r2) {       
        return true;
    }
    else {
        return false;
    }
    if (b4 < y1 || y1 > b4 || r4 < x1 || x4 > r1) {
        return true;
    }
    else {
        return false;
    }
    if (b4 < y3 || y3 > b4 || r4 < x3 || x4 > r3) {
        return true;
    }
    else {
        return false;
    }

none of them seem to work, but if I put just one of those that one does work. Like this: `

if (b4 < y2 || y1 > b4 || r4 < x2 || x4 > r2) {       
    return true;
}
else {
    return false;
}

I have no clue why.