Thaksin, or its affiliated leaders, have won all elections since 2001. The poor results of Monday's early survey results may signal a desire by the electorate to move away from the highly polarized policies of the past.
The Thai Electoral Commission announced that it would announce the final preliminary results on Monday, but promised a final official record and caused many observers to criticize.
When asked about the final results, the commission's chairman, Ittiporn Boonprakong said, "I do not have a calculator with me now."
Critics have also pointed out that irregularities are counted, including nearly two million votes disqualified as "bad ballots".
On Monday, Thais expressed their frustration with the hashtags #PoTaek ̵
The polls were the first since the military had been captured by a coup in 2014 and were seen by many, especially younger voters, as an opportunity to restore democracy after five years of military rule in Thailand.
The electoral commission estimated voter turnout at about 66% of the nearly 52 million voters – much lower than expected.
Pheu Thai secretary general Poomtham Wecchayachai said the party would accept the election result and said at a press conference on Monday: "Whatever the outcome of the vote, everyone must accept the popular decision."  It is likely that no party will gain a clear majority in the 500-seat lower house, and it is expected that the parties will begin power-sharing to form a coalition.
But the cards are stacked in favor of Palang Pracharat.
Critics say that the new electoral rules should discriminate against big parties like Thaksin's Pheu Thai and keep the military in power.
The 250-seat Senate is likely to play a key role in the decision to go to the next government of Thailand. Since it is elected exclusively by the military, it is likely to be in line with Palang Pracharat.
It may take more than a month for the next Thai Prime Minister to be known as an electoral commission and announce the official results by May 9
If Palang Pracharat secures its coalition, it is probably the only nominated candidate to succeed Putsch leader, who became Prime Minister Prayut, will return to power for another four years.
Rising Stars and Fall of the Old Guard
One of the stars of the Sunday election was the newly formed Future Forward Party, which received 5.3 Millions of votes in the last count – that's how we're on the way to becoming Thailand's third largest party.
Thailand's oldest party, the Democrats, the second-strongest party in the last official election in 2011, is currently on track to lose its fortress in Bangkok , with first results in fourth place with 3.28 million votes.
Thailand's highly polarized political landscape has historically opposed royalist, pro-establishment Democrats against those loyal to exile Prime Minister Thaksin – often in deadly street protests.
The Democratic Party leader and former PM Abhisit Vejjajiva announced his party's resignation on Sunday night.