No Otouto Maji De Dekain Dakedo 2021 !!link!! -

The suffix "dakedo 2021" () seems to be a more recent addition to the phrase. The word "dakedo" () is a casual expression that implies "I guess" or "I suppose". The addition of "2021" at the end of the phrase is likely a reference to the current year, implying that the speaker is acknowledging that their feelings of frustration towards their younger brother or friend are perhaps temporary or specific to the current situation.