Well personally I feel thay first of all you should stop hating summer, rather you should start embracing it as a season and accept that it’ll be there no matter what you wish. So to tackle it’s effect , I suggest you should keep yourself hydrated , drink lots of water! Also focus on being busy, I mean you should be working on your stuff so that you actually dont remember that you’re feeling so Hot. That way you’ll improve as a person too. Avoid using lots of deodorant. I personally feel they make you feel hotter. The rest of the common things you already know, like eat fruits a lot and stuff. Hope this helps. Thank you.