Your area is an amazing geographic location for outdoor growing , strain selection might be the issue... My buddy Vom in Quebec likes to grow tons of varieties outdoors and his most successful plants are his autos and his region is a lot like yours. He likes to cross a lot of strains for outdoor use primarily as he is a "Overgrower" the plants he developed seem to be extremely mold and disease resistant but they are not the most potent specimens due to the genetics he uses. They are still quite potent plants though nothing to shake a stick at for sure! He let me in on his primary breeding stock , Suomi hemp. He takes strains that are extremely potent but susceptible to mold and disease in outdoor settings to stabilize them for outdoor growing with Suomi resistance and often it creates extremely large plants with crazy yields... I imagine he spent a couple decades perfecting his art and I bet he struggled doing so and contemplated giving up too... But he stuck with it and you should too because you are a gifted grower just bein hard on yerself. Heck I dunno how many outdoor plants I faught with over the years myself , tell myself the same thing to just give up but something happen to me , I gave up being fussy and I just nurture here n there instead of swooning over them , sorta letem go wild and take what I can get.... Sorta like a lottery haha but my tickets are plants , some win most don't but at least I have a chance hahaha
Like I said I am no expert so anytime I say something take it with a grain of salt , I would hate to waste someones time with bunk advice!