Minecraft crashes everytime i try to join a server or a world - Already tried adding RAM

Ok, so i try to join a server and i crash. This is my friends server so i thought it was just a small bug. So i try to join a more popular server like Mineplex... and i crash. I try to join more popular servers such as the hive, hypixel, Mineswine... crash, crash, crash. So i assign more RAM. I expect it to work but from what i saw it displayed the same error again and again. I'm in need of help.