Tottenham were able to win the Europa league, and they qualified for next season champions league, but if you check Tottenham overall performance, then you will see that their performance was so poor last season, and they are suppose to get a better coach even as they won the Europa league.
Tottenham ended the premier league season at 17th position, they were just lucky to avoid relegation which is really a bad one, I never expected Tottenham to end the season at the position which they ended the season, they were just lucky in the Europa because they didn’t play any strong team until they got to the final, and Manchester United had a terrible season also, and Tottenham took advantage of it and were able to win Manchester United in the final, seriously Tottenham really needs another coach.
Not only a new coach but Tottenham also need a major overhaul in their squad if they want to compete fiercely in the Premier League and also UCL next season.
Winning the Europa League title is quite impressive especially Tottenham who have never won a trophy but it is true as you said if you look at the overall performance of Tottenham last season was not impressive and indeed they need to make big changes and I expect there will be many quality players brought in by Tottenham management.