Squalor was a 4-issue limited series published by First Comics which ran from December 1989 through March 1990 and was created by Stefan Petrucha (writer) and Tom Sutton (penciller).
At the opening of the series, he has recently been released from a mental hospital and has somehow gained the ability to travel into A-Time, where he discovers a plot by extradimensional beings to invade our reality.
This seems to be further evidence of his insanity to those around him until he starts to display knowledge of secret and/or future events such as what a waitress thinks a ketchup stain looks like.
He later discovers the ability to bring other people into A-Time with him, and uses his knowledge of the past and present gained from being outside the timestream to simulate other powers.
Though only four issues of Squalor were published, Stefan Petrucha later returned to the concept of A-Time in the TimeTripper novel series.