Hi I've not read through all your replies, so I may be going over 'old ground'. What leaps out at me is you are waiting for him to do the asking! Don't!! Even when he's much older it's YOU who should be dictating when he needs to go outside, based on when he last went. Actually it's normally easier to get a male to empty, peeing at any rate, because of the inclination to mark where any other dog has gone, once he can go out off your property. Bitches don't do this
So get down to taking him out regularly so to avoid his 'need' to be emptying indoors. When you catch him in the act, and I do realise with a baby Basset especially that you often don't see it until he's moved off
, correct him, but don't shout or hit. Just say ah-ah and get him outside. When you find a mistake, just clean it up without comment. He'll be watching, and noting your body language. When you take him out and he empties, go nuts with the praise. So it's clearly obvious that going outside makes mum happy and anywhere else doesn't.
NO PEE PADS! Ever. This only tells him it's okay to empty indoors. And certainly not in his crate. Your aim should be for the crate to be the very last place he poohs or pees in. And if he's going in there, you are not getting him out often enough. Once he learns that even if in his crate, you will be letting him out frequently, he will start to learn to hold until you do.
With poohing, it's easier. On 3 meals a day, he should need to empty 3 times, + one, with a normal stool. Obviously with diarrhoea, this can't be controlled. Take him out first thing and he should have a BM and a pee. Feed his breakfast and take him back outside to either just pee, or have a BM if he didn't first thing. Crate overnight - but plan on getting him outside once during the night as, although by 14 weeks he should start to be able to go through the night, he needs to be given the benefit of the doubt so he doesn't mess in his crate
Digestion in the dog takes roughly 4 hours, which should help you work out his need to have a BM.
I've never had a problem getting mine house-trained (other than one puppy b itch who it turned out, had urinary tract problems), but it needs persistence, and consistency so the message gets through
And never forget that his mistakes are your mistakes.
Apologies for the length of this but I hope some of it helps.