Even though Manchester United failed to compete in the top four, I think this result is still a process. So, if Erik ten Hag is still given the opportunity nextseason,then ofcourse I still confident that Erik ten Hag will be able to make Manchester United compete in the top four. But indeed, if next season Erik ten Hag fails to make Manchester United compete in the topfour then ofcourse,it would be the right time for Manchester United to look for a new coach. But for now, I don't think it's a problem ifManchester United still gives Erik ten Hag the opportunity for a third season with Manchester United next season.
I think Manchester United will choose to not sack Ten Hag because he already bring FA Cup trophy without any expectation. Next season there are many teams changing their coach and their players, so they should have higher chance to finish in the top four considering Liverpool, Chelsea and Aston Villa will not be as strong as this season.
They also qualified for Europa League too, if Ten Hag can win this competition even though they didn't earn anything in domestic league, The Glazers might will think twice to continue with Ten Hag again.