Rescue has a bunch of issues. Im burnt out and exhausted.

Hi everyone, hope you're all having a lovely day.

My family and I adopted our 2 year old boy from a rescue shelter about 6 months ago. He came with his issues and I worked so hard to build a routine and did so much research with him.

When my grandfather lived with us, he would yell at doggie a lot and as a result he would have a lot of accidents. Once grandfather left the issue cleared up. Hes a super smart dog, we live in a really bad climate so he knows to go to the balcony for potty where we have things set up for him (pup pad, scent spray).

I figured that me not being harsh and yelling was the key and that was working for a while. However these days he's been having more and more peeing accidents inside and its so discouraging. When he had other issues (barkinf at people at door etc.) The only Thing that worked is my uncle being firm. That is genuinely the only thing that made him stop. He would be super strict, push his butt on the floor and make him sit. So now being firm/strict does work? I dont understand.

I just need help. Im so tired. Thank you for reading.