filtering an array by date and pass matching data set to a new array to be written into a google sheet

Hi im currently trying to compare an array of data using the ArrayLib but it is unable to match any of my dates and thus passing all of the data sets instead of just the ones between the date range. If there is a better way to achieve this im open to it [copy of my code that I am currently using ][1]: https://i.sstatic.net/Uj7Wo.png

EDIT: as requested a Google sheet of a sample data table im using: https://docs.google.com/spreadsheets/d/1whrB9O84i85grz6Av3EY-hnGGNvVG6ji_v5w7X_rMG0/edit?usp=sharing

Instead of using a separate library to filter your multidimensional array by date, you can try this sample script below:

Sample script

function main() {
  var ssLc = SpreadsheetApp.getActive().getActiveSheet();
  var rangeLc = ssLc.getRange('A1:R15');
  var Lc = rangeLc.getValues();

  var startDate =  new Date('January 04, 2021 08:00:00'); //Used GMT time on my testing
  var endDate =  new Date('June 03, 2021 08:00:00'); //Used GMT time on my testing

  var sampleResult = filterByDate(Lc, startDate, endDate);

  for(x=0; x<sampleResult.length;x++){ //Sample loop to log the each filtered array data
    Logger.log(sampleResult[x]);
  }
}

function filterByDate(arrayData, startDate, endDate){
  var newArrayResult = [];
  for(index = 0; index < arrayData.length; index++){
    if(arrayData[index][0].getTime() >= startDate.getTime() && arrayData[index][0].getTime() <= endDate.getTime()){
      newArrayResult.push(arrayData[index]);
  }
 }
 return newArrayResult;
}

Sample Result:

Used your sample spreadsheet data:

Sample result by filtering data from January 04, 2021 to June 03, 2021