It's a tough situation to be in, feeling stuck in a college you dislike while also facing academic setbacks that limit your options for change. Firstly, acknowledge your feelings. It's valid to want to leave a "worst" college environment. Your well-being and learning experience are important. However, the failed second semester is a significant hurdle that needs to be addressed strategically.

The reality that changing colleges now would likely mean starting from the first year again is something you need to accept. While it might feel like a step backward, consider it a fresh start in a potentially better environment. If your current college is truly detrimental to your growth and learning, restarting in a better place could be a worthwhile long-term investment.

Before making any drastic decisions, try to understand why you failed the second semester. Was it due to the college environment, your study habits, personal issues, or the course material itself? Identifying the root cause can help you avoid repeating the same mistakes in a new institution.

Now, let's consider your options. If you are absolutely certain you cannot continue in your current college, then preparing to restart in a different college is the most likely path. This means you should start researching colleges you'd prefer. Look into their admission processes, eligibility criteria, and fee structures. Since you'd be applying as a first-year student again, your Class 12th marks and any entrance exams they might conduct will be crucial.

Simultaneously, reflect on your academic performance. If you decide to restart, make a conscious effort to improve your study strategies. Consider seeking academic support, forming study groups, or even exploring online resources to strengthen your understanding of the subjects.

Another avenue to explore, though potentially less likely given your failure, is to inquire with other colleges about their transfer policies. While most might require you to have passed all previous semesters, it's worth a shot to see if any institution has more lenient rules or offers a pathway for students with academic difficulties in their previous college, perhaps with certain conditions. Be upfront about your situation and see if they offer any guidance.

Finally, consider the immediate future. While you prepare for potential admission to a new college for the next academic year, you might have to continue in your current college for a bit longer. During this time, try to focus on what you can control. Can you minimize the negative impact of the environment? Can you use this time to study and prepare for future entrance exams or your first year in a new college?

In conclusion, while restarting might seem daunting, if your current college is truly hindering your progress and well-being, it could be the necessary step towards a better academic future. Focus on understanding the reasons for your past failure, research your options diligently, and prepare yourself for a fresh start. It's a challenge, but with a clear plan and determined effort, you can navigate this situation.