The phrase "increasing criticism" means that the amount of negative feedback or disapproval is continuously getting more intense or growing rapidly. Full definition
In recent years that model has come under increasing criticism. (religion-online.org)
However, the pull - out approach met with increasing criticism over the years. (educationnext.org)
Garde has had little help in the way of reinforcements to at least try and push the club in the right direction, with owner Randy Lerner and his colleagues coming under increasing criticism from supporters with protests seen at the stadium. (caughtoffside.com)