Part of Busch’s struggles might be related to practice limitations amid the pandemic, though that’s something all drivers are dealing with.The 35-year-old still hasn’t won a race this year; at this mark in the campaign in 2019 he had four victories under his belt.”It’s on your mind that we don’t have that win and haven’t really been in contention to get that win a whole lot this year,” Busch said. Busch, never afraid to vent, sounded off about his frustrations this week and acknowledged his bewilderment at his inconsistency.”There’s just no speed in our race cars for some reason,” Busch told reporters. “I don’t know what’s going on. It seemed like, even when we were mired in 10th (at Bristol on Wednesday), I was driving 110 percent just to maintain where the hell I was — not going forward.”MORE: Chase Elliott dominates All-Star Race Kyle Busch is enduring his worst NASCAR Cup Series season in years, carrying his worst average finish and lowest rank since 2014 while dealing with an uncharacteristic lack of oomph behind his No. 18 vehicle.Busch has been unable to put back-to-back positive performances together of late. He followed a sixth-place finish at Homestead with a 32nd place finish at Talladega, a fifth-place finish at Pocono with a 38th place finish at the same track and a sixth-place finish at Indianapolis with a 21st place finish at Kentucky last weekend.