I think Tilly was a very well written character, especially in the beginning. Not much experience, friendly but awkward. Very human unlike the big heroic captains. But I agree, Burnham is the most unlikeable main character in Star Trek. I also find Georgeou and Booker annoying and Saru was cool in the beginning (especially when there was still a wow factor for the visual work) but he also wasn’t faring too well lately. Most of the rest of the cast is okay at least and Jason Isaacs and Anson Mount were highlights in seasons 1 and 2 respectively.