Disadvantages of politics:
1. The number of your enemies will increase
2. It will be a waste of money.
3. Your time will be wasted.
4. You may have the possibility of death.
Political apathy is at the minimum because of political activities. Participating in politics gives the citizens a sense of responsibility. Yea, the responsibility of being part of a decision making process. Politics has been abused, we know. Especially in African countries where all that that OP stated above is the obvious case. This doesn't give us a reason to scrap politics. Remove politics and it's activities from governance and see the damage that will be done.