be that as it may
be that as it may
​(formal) despite that
synonym nevertheless
I know that he has tried hard; be that as it may, his work is just not good enough.
e.g.
/fe3hdialogue/Byleth×Flayn Support Conversations#61f0cd97bdb0e50000c45966 そーんなこと、あるはずありませんのよ？
/fe3hdialogue/アロイス＆シャミア外伝 剣であり盾たる騎士団 Sword and Shield of Seiros#620d9d98bdb0e500005404e7 とはいえ
/fe3hdialogue/対王国戦線 Facing the Kingdom#61ac482fbdb0e5000092cd22 ……余計なお世話よ