I wish I could watch shorts from only my subscribed channels.
This isn't a bad format inherently, it's just being abused. I like seeing short Blender clips, or short guitar tutorial on a riff, or stand up bits that sit well within the time frame.
In the app, you can just open your subscription tab and click on the Shorts section. That way you'll only see Shorts only from your subscribed channels.
I my shorts feed is now only shows content from standup comedians. I discovered several that I really like Troy Bond, that guy is hilarious and just started doing comedy since COVID. If there's no Shorts I might not discover him.