It's Tom Clancy's Rainbow Six Siege on Steam. After launching the game on Steam it launches Uplay which auto logs in, checks for updates then after a few seconds it runs BattleEye Anti-Cheat which probably checks all my running programs and other related things for a few more seconds and then finally I see the splash screen of the game and a couple of seconds later the game launches in full screen.
On my PC with Defender, it takes around 45-50 seconds for this to happen. With Comodo, ESET, Panda it takes around 30-33 seconds on average. I'll check out Kaspersky Free next, which I am expecting not to slow down the launching of this particular game either.
Anyway, don't just take my words for it because AVs tend to run differently on different hardware and mine isn't a high-end PC either. It's a pretty good custom-built budget PC. So if you don't notice any slowdowns, then no need to change your config. If you decide to explore other products, then better keep a system backup image first. Some products are terrible at uninstalling themselves leaving many residuals behind.
Also, about your issue with HTTPS scanning, as far as I know, except Bitdefender Free all other products which have the feature give you the option to disable it.