Mathew Rosengart issued a blistering statement -- "The conservatorship has been terminated and Mr. Spears was suspended ignominiously. Under the circumstances, his petition is not only legally meritless. It is an abomination. Britney poignantly testified about the pain her father caused her and this only adds to it. This is not what a father who loves his daughter does."

Jamie Spears filed legal docs to make Britney's estate pay for his legal fees in winding down the conservatorship, asking that it be paid in a "prompt" fashion.

This all comes on the heels of a blistering report by the New York Times, alleging, among many other things, Jamie received a $40,000 loan from Britney's then business manager, Tri Star Sports & Entertainment early on. According to the NYT, Jamie received $6 million from Britney's estate, while Tri Star benefited to the tune of untold millions.

The report also claims the estate paid for a security company that surveilled members of the #FreeBritney movement who went after Jamie and Tri Star and its owner, Lou Taylor.

And the NYT reports Tri Star donated tens of thousands of dollars from Britney's charitable foundation to a Christian counseling group ... a group in which Taylor was associated.

And, the allegations go on ... that Britney's estate paid for advertisements touting Tri Star and Taylor.

As we previously reported, Tri Star was receiving a percentage of Britney's earnings, which for many years were sky-high. When she stopped performing, Tri Star asked Jamie to approve a minimum guarantee of $500,000 which we're told Jamie approved. This drew heavy criticism because the concept of getting a percentage is that you take the good with the bad.

Jamie's lawyer, Alex Weingarten, has said all expenditures were made with the approval of the court or Britney's court-appointed lawyer, saying, "Jamie has nothing to hide and will therefore hide nothing."