Despite the success at the general election, the party found itself dogged by infighting and resignations afterwards. Prominent member Saoirse McHugh, a candidate in the 2019 European elections, 2020 general election and the 2020 Seanad election, resigned from the party upon the Greens entering government with Fine Gael and Fianna Fáil, parties she believed would damage public enthusiasm for environmentalist policies by pairing them with "socially regressive" policies. Over the course of 2020, 4 councillors as well as both the leader of the Young Greens and the leader of the Queer Greens would also depart from the party, all citing either bullying within the party or dissatisfaction with the coalition and its policies as the cause. Amongst the resignations were councillors Lorna Bogue and Liam Sinclair, who subsequently formed a new left-wing green party called An Rabharta Glas – Green Left in June 2021. Infighting continued in 2021 over attempts by Green Chairperson Hazel Chu to run for the Seanad. In May 2022, Green TDs Neasa Hourigan and Patrick Costello were suspended from the party for six months after they went against the party whip and voted of an opposition motion calling for the new National Maternity Hospital to be built on land wholly owned by the state. Hourigan was suspended again in March 2023, this time for 15 months, after she voted against the government on the issue of ending a ban on evictions.
