These are common issues. Try not to lecture others or even take them on with arguements. It is fuite and can be counterproductive. Engage with your family in non relegious activity as long as it is not haram. It is Allah's mercy that you recieve guidance when you are at loss and oblivious. So is many of us and so be merciful and be patient. Do dua and show beauty of deen with kindness. Do not accuse others of hypocrisy in haste. Hold you tounge. If one accuses of being extreme. Let this pass! Your forebarance is itslef is test and a method of bettering yourself. I have found only the TJ who can gradually bring around the family effectively over a long period. Be subtle. Play soccer and mantain kinship and slowly direct your brother to masjed / salah. One thing at a time.