I tried simulating one and here's how it turned out: https://matchsimulator.com/cup/864266/uefa-euro (I tried making the knockout matchups as accurate as possible)

not gonna lie I think it's quite accurate regarding the winner, Germany has been in good form lately

There isn't a way to upload custom pictures I presume due to copyright

I do have an idea tho: maybe the site could have all country flags uploaded to it and let mods use the flags for nations not in matchsimulator (once again this is just a suggestion, I am not forcing anyone to do anything.)

I'd like to add for group draws that there could be an option to turn on continental restrictions for national teams, i.e. 2 african teams can't be in the same group for example (tho idk how this would work for modded national teams, maybe these mods could get the option to set their team's continent?)

For knockout draws, group A winner faces group B runner-up all the way to group G winner facing group H runner-up for the first 4 draws. For the next, group B winner faces group A runner-up and so on. Would be cool

Compared to things that'd be hard to make, live odds isn't one of them, and I don't see how I'm wrong about the match simulator itself being one sided against certain teams. This is a beta site and we talk about future updates, suggestions n stuff im not trying to be disrespectful but maybe it came across that way to you

Over what am I being disrespectful exactly? I'm just giving my own suggestions and thoughts on stuff. I like matchsimulator and hope it'll only get better from here now on.