Terrible Surface Pro 8 Battery life - Nearly 1% drained per minute

I bought a Surface Pro 8 a month ago and since then it has had terrible battery life. I've updated it whenever a new update was available but it's still giving me major issues. I logged in at 7:50am this morning and by 9:24 it had gone from 90% battery (I'm also not sure why 10% drained overnight while in hibernation?) to 37%. For an hour of that time I was on a Teams video call but I'm still seeing significant battery drain during other types of usage so I don't think it's because of Teams but I'm not 100% sure. Other things to note that I don't believe should impact it that much are that I had it on 100% screen brightness during that time because I find the screen disappointing dark (darker than my previous few laptops) and I had the surface keyboard attached and some bluetooth headphones attached to listening in on the Teams meeting.

See the two screenshots below. Can anyone help because the laptop is clearly unusable if I can't use it for more than 2 hours on battery per day. I'm shocked at how bad my first Microsoft product is compared to the years of using Dell, Lenovo and HP with no issues.

I purchased the Surface Pro 8 before leaving Australia and have moved back to Ireland so may have an issue claiming on warranty if I need it fixed?