Well, the problem is that you lack the necessary knowledge to fly a Polarized Marauder. So, in your logic, every character that refers to Polarized fit is a scammer. Here, take mine, be a guest:
And now lets be a little bit more constructive. First of all, I hope that @Aceyfacey continue to do more videos adout the matter, and @Anderson_Geten continue to expose is excelent knowledge here in the foruns about his fits, well, if you try to search a little bit.
Second, welcome to EVE Online, and I hope that you are enjoing the game. You just learn the first rule, never fly what you cannot pay. Marauders are easy mode of Level 4 missions, even polarized. I have done hundreds of missions with Polarized Battleships, never lost one. You just have to research the fits and missions that can provide the correct results.
Third, you know that exists a Test Server? You can try some fits and see if works.
Last point, dont blame the others for your own fails, be constructive, try to improve next time. A lot of people come here and ask for recomendations, and good folks, @Anderson_Geten included for many many times, come here and give the best advice possible.