Denny Hamlin ran in the top-five during the final laps of Sunday’s Cook Out 400 at Martinsville Speedway before a caution with three laps to go sent the race into overtime. Hamlin struggled to make passes before the caution, hung up by Austin Cindric who wasn’t on the lead lap. Frustrated by his inability to get by Cindric, Hamlin went on a rant about the Next Gen car during Monday’s “Actions Detrimental” podcast. Hamlin, who finished P11 after opting to pit ahead of the overtime restart, said that “the racing needs to be fixed.” “So, now you’ve not only created the Next Gen of cars, you creat…