MIAMI — It’s not how you start, it’s how you finish that counts. And in Thursday’s series finale against the Padres, the Marlins struggled to get things done. Hitless through five innings of Miami’s 10-1 loss at loanDepot park, the club loaded the bases on singles to start the bottom of the sixth. Then, the Marlins did what they unfortunately do a lot: ground into a double play. A strikeout ended the inning and stranded two on the bases, as Miami was unable to muster a response to the Padres’ seven-run top half of the inning. It marked the 63rd…