Former Dutch international striker Pierre van Hooijdonk believes that "even the biggest clowns" of English football are laughing at Louis van Gaal's unimpressive style of play at Old Trafford.
Van Gaal, after a summer of heavy spending, has led Manchester United back into contention for Champions League football after last season's disaster, but his side have failed to convince.
United snatched a late draw against West Ham on Sunday in their last outing, a point seemingly undeserved after another tepid defence, and Van Hooijdonk has been far from impressed.
Speaking to Voetbal International, Van Hooijdonk said "Louis looked like a suitable successor for David Moyes but, at the moment, he is disappointing.
"To steer away from the results, the way they are playing is awful. I can't see the touch of Van Gaal; he is unrecognisable."
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"It all started in the summer. You couldn't follow their transfer policy. It looks like United just bought some great names. The result is a team of top players without any unity.
"Even the biggest clowns are laughing about Van Gaal. During my spell at Nottingham Forest I've worked with them: Dave Bassett and Ron Atkinson.
"In England they're respected coaches, but I know they are just really bad actors, men that had no idea how to improve a team. These guys and [Sam] Allardyce as well."
Long ball United
These comments from Van Hooijdonk come after Sam Allardyce accused United of playing long ball football to get a result at Upton Park in the weekend encounter.
Although Van Gaal issued a vigorous defence of his sides style of play in the game, the former Celtic and Nottingham Forest forward believes United's performances have been awful and the Dutch manager's impact at Old Trafford has been "unrecognisable".
United have slipped to fifth in the Premier League but will reclaim third place if they beat strugglers Burnley at Old Trafford on Wednesday.