Pathetic quality

My samsung Galaxy S5 is again giving problems and it is only 14 months old. This is now my 3rd Samsung in a row that is giving me hassles. My S4 gave issues within a month, Samsung responded and said it was a bad batch that got manufactured. Second S4 had battery issues after a year. Now I am sitting with a S5 that is still as good as new on the outside but the phone freezes whenever i go on it. It took 10 hours to charge fully yesterday and as soon as i took it off charge the battery started to go down again. After an hour it was back on 15%. I have now again fully charged it, just to start having the same problem. I even switched off my phone now and when i switched it back on it was 10% less battery power. Samsung your products are PATHETIC. I WILL NOT recommend your products to anyone, and i will be letting everyone know about your ****ty quality.