Dutchman De Boer was charged with changing Palace’s playing style after taking over from Sam Allardyce this summer, but failed to record a win in his first four league matches.
The Eagles also failed to score a single goal under the 47-year-old, with Saturday’s 1-0 defeat against Burnley signalling the end for the ex-Inter Milan boss.
Crystal Palace look set to appoint former England manager Roy Hodgson as De Boer’s successor, leading fans and journalists to criticise the knee-jerk reaction online.
With De Boer only given 77 days to alter Palace’s entire playing philosophy before being axed, fans are understandably upset that Hodgson’s appointment could suggest a return to a more conservative stye of football.
Scroll through the gallery above to see some of the best reactions from journalists and fans on Twitter as Crystal Palace sack Frank De Boer.