Rating TV Shows by Seasons

Is it possible to add a rating system per season? I know many TV shows tend to decline after a few seasons, so it would be nice to know when to drop a show by seeing a rating for the season as a whole. I understand that each episode already has its own rating, which I look at, but the rating pool is much smaller than the full show rating. I think it's hard to judge a show solely based on the overall rating, as most people who rate it are likely from the first season. Having a tiered rating system per season would help provide a more accurate rating, along with the show as a whole rating. Personally, I only rate shows as a whole, as I don't take the time to rate every single episode, especially when binge-watching several episodes, as I might forget how to rate episodes from a few back anyways.

Having watched The Witcher seasons 1-3, I give season 1 a 9/10. However, it's currently listed in the show as a whole rating, which I think is not a good representation of my overall rating of the series.