I'm sorry to hear that. Hopefully the tinnitus condition gets better with time too but sometimes it can be permanent. Maybe there will be a treatment or cure that can help.

Covid did mess up cancer treatments too, some could be an increased risk directly by vaccines but others not diagnosed or treated as quickly as it should be if it wasn't for lockdowns and social distancing etc.
We lost a cousin and an uncle (her father) this year to cancer and my uncle thought his skin cancer could have been noticed sooner if it wasn't for lockdowns. He was a doctor and used to meet other doctors socially regularly before Covid so they could have seen it on the back of his head and told him to get checked. He got treatment after cancer was diagnosed but it didn't work in the end likely because it was not spotted soon enough.

For Covid vaccines I'm still skeptical but I do trust the effectiveness of measles, mumps and rubella (MMR) vaccine and others. For some vaccine we are clearly better off as a society by having them in my opinion.