Wow.....thanks. I will try, thanksThis is a combination of specific advice for this situation as well as how to play hyper offense in particular and some general advice for improving at the game.
I would recommend sticking to one team concept/archetype while you are laddering and tuning it to the meta when necessary. Unless the team you are using just isn't functional in the meta you'll get more mileage out of using the same team for many games as you will begin to learn what to do in certain situations/not get caught off guard by damage rolls and etc. I would also say that I don't think that webs is not super viable in OU. Balance is also underperforming at the moment but it certainly can work.
Screens HO definitely works in the current meta and it's a pretty easy team to play as well. Basically you are wanting your game to go something like this:
identify your wincon (your Pokémon that beats most of the opponents team/beats the opponents team if a few key Pokémon are out of the picture/weakened)
set up hazards if you have them
soften up the Pokémon that need to be weakened in order for your wincon to sweep (you can use screens to help facilitate this but try to save the screen setter if you can)
set up screens and then ideally sacrifice something so you can bring in your wincon safely
your wincon sweeps the opponent team and survives stray hits from the mons that outspeed it/it fails to OHKO thanks to screens
all hyper offense teams are based around this idea of identifying a win-con and then chipping away at its checks until you can blow through the opponent's team. If you are not clicking screens to set up a sweep, you should probably be clicking something that's going to do damage (straight up attacks but also hazards/boosting moves) otherwise you will sort of run out of gas. Don't be afraid to sacrifice Pokémon, hyper offense can frequently come back from 5-1 or 6-2 scenarios.
When playing hyper offense really focus on identifying win-cons and checks/counters to wincons(for both you and your opponent!) This is the most important element of HO and overall a really important concept in Pokémon. Always have the mentality that your opponent is asking themselves the same questions you are asking yourself. (What is good in this battle? How do I finish this battle? What does my opponent have that can stop me?) This will give you some insight into the moves they make before they make them.
Watch your replays, especially your close losses. Try to identify the turns where you made plays that led to the loss. Pay special mind to the long-term effects of your plays. Sure you switched Corviknight into Excadrill's earthquake, which seems like a good play out of context, but if that Excadrill set up on Corviknight after that and swept you because Corviknight didn't have body press then it wasn't such a great play.
Anyway, this post is definitely leaving the realm of "simple answers" but here's a few final rapid fire pieces of advice
it's better to make safe plays if you are ahead and you may need to make desperate plays if you are behind in order to have any chance of winning
if you get on a streak of several wins/losses or suffer a particularly bad loss, take a break. you will play much worse if you are salty/overconfident. you cannot win the battle at hand if you are still fighting your previous battles
seriously, analyze your replays. even if it seems like you lost to hax, always try to find the places where you could have done better. you can never change hax but you can always improve your play
Good luck! Don't get discouraged and remember that this game takes a long time and many losses to get good at.