while I don't completely believe he doesn't love his son, I just don't think Clint is taking an active approach to helping Josh. yes, he's a grown man with his own mind but he's a moron that is incapable of doing anything right. nobody knows their family history so nobody can say for sure if clint was a good father/not caring/etc/. I think what rubbed me and other people the wrong way is the fact that clint has always had this "don't worry josh, you're perfect just the way you are and if anyone says anything bad about you, they are clearly jealous of you".
while it has been stated that clint has tried getting josh to stay clean, stop smoking, or just being a decent human, josh just doesn't want to listen and thinks his way is the best way. i think it's fairly obvious to anyone that's been following josh for any decent period of time can see that. i wouldn't be surprised if clint is just happy his son isn't like actively trying to be a piece of shit in society, he can sleep well knowing that