how long have you been contracting/how many clients have you had? imo, working for client is way, way worse (in terms of how rewarding and interesting the work is, and work flexibility) than working for a company. but hey, if you enjoy it...

There are plenty of things that are worse about working with a client but I find they bother me less than other people.

There are things that are better too.

Asserting your independence and keeping a distance is a good place to start there. Don't be another employee.

Stoicism helps.