To each their own. I've never seen Insecure but I loved Louie too. I don't strictly view Fleabag as a comedy but there's a lot of truth in it that resonated with me. I just look for stuff that surprises me, which is not most things these days.
I've never been a fan of the typical cable sitcoms - How I Met Your Mother, The Office, Big Bang, etc. Only long running sitcom I like is Curb Your Enthusiasm. Also think the funniest shows are usually cartoons.
I also liked Louie. Like Louis CK's stand up itself, it was just a touch raunchy and more than a little weird, but also relatable.
I usually don't go for the schlocky broadcast sitcoms either. But I thought How I Met Your Mother was pretty good until the last season when it got ridiculous, and the finale was outright bad.
The Office has always been overrated, but it was good for what it was. I also appreciate that it launched a lot of careers for the supporting cast, which has to count for something.
Big Bang Theory (and Two and a Half Men before it) was absolute trash. I have no idea how anybody found Sheldon funny instead of relentlessly annoying.