oho, bertie's home life... it's. complicated. ;;
tl;dr version: once upon a time, luca balsa's dad had a sister who ran away, fell into poverty, and ultimately became a prostitute. it was then that she had a child... this child was taken away to grow up in white sand street orphanage, and told his mother had died in childbirth. this was bertie
bertie had a rough time in white sand, as most of the kids did, and he still harbours very mixed and complicated feelings about kreacher. he was the closest thing bertie had to a father figure, and he could tell kreacher did what he could to keep the orphanage running, but his temper was not the best.
eventually, bertie was hired out of WSSO as a teenager and sent to work for the woman who became his mistress. it was there that his current attitude towards himself and his "betters" was really solidified. some of the other servants did treat him kindly (for example the cook, who spoiled him a little by making cherry cake as a treat sometimes) but he never really had a proper home life, so to speak.
so yeah. poor bertie... 😭