Bayer Leverkusen won't underestimate this game for sure, but I like your warning because Darmstadt recently tied their game against Frankfurt at home and I think if they can tie a game against Frankfurt, they can do it with a little bit of luck against any team. And it shouldn't be forgotten that only in last game Leverkusen couldn't manage to score a winning goal against Gladbach at home. So it's always right to plan to go all out instead of looking at the table thinking that this should be one of the easier games. It is the easier games that can break Leverkusen the neck as much as any other game in the fight for the title.
It would be very careless if Leverkusen considered this match to be easy and underestimated the opponent because after all, even though in terms of the quality of players and experience they are far superior to Darmstadt, which in fact is a promoted club but making as if this is an easy match could backfire on Leverkusen itself.
This match must be won especially by looking at the schedule that will be faced now by Leverkusen this match as an opener for 2 matches that are quite heavy in the next 2 matches because they will face VFB who gave a good surprise this season in the quarter-finals and of course Bayern who are ready to wait in the continued bundesliga so that victory must be a fixed price in this match for Leverkusen in order to give a burst of enthusiasm to face their 2 big matches.