The commercials aren't bad but I feel like they are boiling the frog. A few before the show starts isn't annoying now but within 5 years it's commercials every 15 minutes like broadcast TV.
You made the right call to just stop. The last episode of the season wasn't even great. Just dimension hopping fan service: oooh spiderman, oooh zombies, oooh batman.
I may be a tad biased, but I'd say the second half of the season (especially the last episode) is very much worth watching. Many plot points have been improved from the comics, and it felt satisfying the whole way through to me.
That said, fuck the break, and fuck Amazon. Don't give them money just to watch the series.
I agree that overall the second half was good. It was only last episode with it's the dimension hopping time filler that annoyed me when it could have been Nolan's rescue.