I really, really like the show, and find it entertaining, but I'm conflicted on how good it really is. Likely, because of what you mention here.
Character development is a problem. I look at Ruth and her relationship with Marty. Ruth is an entertaining character. I like her and root for her. But I don't really get why she does what she does. Certainly don't get her loyalty to Marty (while it lasted). And certainly there's a balance they could've struck between "brash and DGAF" and "completely stupid" (her and Frank Jr. this season for example).
I agree some things just feel rushed and too convenient.
It has so many elements of truly great shows, and is highly entertaining. But just doesn't quite hit the mark. I think the nit-picking is a compliment. If there weren't those elements and times when they are hitting the marks of an all-time drama, there'd be no need to nit-pick.