You can refer to something such as an unpleasant emotion or an undesirable quality that seems to affect every aspect of a particular situation as a blanket of that emotion or quality.
You use blanket to describe something when you want to emphasize that it affects or refers to every person or thing in a group, without any exceptions.
"he pulled the covers over his head and went to sleep"
2. anything that covers;
"there was a blanket of snow"
3. a layer of lead surrounding the highly reactive core of a nuclear reactor
Verb
1. cover as if with a blanket;
"snow blanketed the fields"
2. form a blanket-like cover (over)
Adjective
1. broad in scope or content;
"across-the-board pay increases""an all-embracing definition""blanket sanctions against human-rights violators""an invention with broad applications""a panoptic study of Soviet nationality"- T.G.Winner"granted him wide powers"