Another way to sort of improve privacy with Bitcoin is by using Lightning Network and second layers solutions like Liquid Network that has confidential transactions.
This is not perfect privacy and you do have to peg-in and peg-out or swap back onchain at certain point, but it is much better for using with smaller transactions, especially when transaction fees are higher.
I am sure we are going to see more solutions like this in near future that are backed by bitcoin, and combining them with other tools will give much better results.