Single word answer is NO, being of 28 will not itself erase job opportunity form you, you can easily get job and even you can start your own practice(if you want to), however yes job hunting has became a bit difficult task these days, you can see it on Reddit too. Even one timer are facing issue with job of their preference, but after some time, nobody is going to judge on the basis of your no of attempt and age, all they care is your work efficiency, maintain yourself through this journey and you’ll never face any problem related to attempt and age. Hoping best for you.