no wonder u don have problem with s pen,my son also don have using s pen for drawing,if u cannot what s pen will do more than sms,check on youtube,maybe u can check my newest post,if u can understand smart select and extract text function
mine are ok so far. in every phone model, about 10% of the buyer will have problem. just happened that you are in that 10% buyer. however, my opinion, it's not really about the default, but how Samsung should take care of you / the customer. if the phone is brand new, I think the best way is just replace it with a new one.