I tend to see "shitcoins" as experimental projects for possible second-rail technology. Bitcoin is very good at being a monetary reserve asset and it can't be invented twice.

Forced closure. Some of the connections are unstable.

Generally don't like that you need to maintain a channel, so that you have to stay online. Seems inefficient. I think there are some teams working to solve for that.

This I can understand. Especially, when the network is crowded. Personally, I've never had this issue. But, I've heard some complaints from other users.

You're not wrong. Alot of the core aspects of some of these projects have been fused with the main chain and LN.