Well the infrastructure is getting better on the one hand, but the main reason that people lost interest. Once the price crashed from $20K to $9K, a lot of people lost interest, cut their losses and sold off their coins, so there are fewer transactions right now. Let's see what will happen once the price starts rising again and reaches, say, the $15K level.
I agree with you. There were many newbies and new investors when the price reached 20000 dollar. They caused the network to become that busy. Now the network is working better, because most of that newbies have left the market. I think once the price rises again, network will become more busy.