tbh i would have changed exactly two things.
one: i would have moved the pick arrows and countdown to a large plae grey upscaled and placed behind the chat history box from the tiny arrows on the corners above the champ list.
two: bans would come after picks and force repicks.
there have been plenty of first timers not getting the mode in the draft phase, and i myself fell to a very active chat on selections and mistakenly running out of time due to misreading timer while focused on team chat during picks, though these things get learned from and grown beyond rapidly.
from there it is more about having people who understand that simply because your champion is a mage doesn't mean you cannot build fulltank or adc instead if given your teams options the champ you have can best fill that type of role through itemization.
about having people who understand what many champions actually do(no ashe is not JUST ad, she can build full ap and cause pain ruining that strategy), or perhaps giving the enemy large amounts of spammable cc and mobility on the basis of "just support" is a failure of your imagination and knowledge.
about having people who don't think that "well, this champ is hard for me" extends to everyone else. or because they don't know a champ noone does. or that "vayne is high skillcap so she will definitely feed" is rational when any one of the enemy 5 could main the champ.
about knowing how to present some key communication about your experience with different champions you have available to your team among other things and not hiding inexperience with what you were initially picked until you are deep in and losing hard.
about agreeing on a plan during picking instead of everyone does whatever, and asking for suggestions to fit the plan if in doubt. cooperating in forming a composition, especially if your team starts picking second and you have a known champ on your side to work from in counterpicking a comp.
about being aware, flexible, knowledgeable, and versatile instead of a "riven only lel" and/or "my lane is an island forever" type.
or even simply about(in particular when the other team picks first) knowing how to counterpick.
the general level of thought present most of the time is proving pretty low overall. also apparently most players have no idea what poppy, skarner, urgot actually do as a kit. they also seem to think playing yorick passably is too hard to be done.
i've had some atrocious games (invaded repeatedly with no team response behind elise is ..really hard. think that is definitively my worst game since i started this account http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1735704238/42797991?tab=overview ), i've had some amazing games, i've had at least one that went over an hour(on skarner jungle who i may have used almost 5 times in three years and i don't own ended with ~6k gold i couldn't spend and carried through after more surrender votes than i could count to win it.http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1732970686/42797991?tab=overview ). i've had a 4v5 a couple times with at least one becoming a win (with the afk coming back for the final push underlevel because they were "surprised and impressed" how hard i was working poppy to keep us in the game. http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1731431343/42797991?tab=overview ).[and yes those enemy comps were according to whatever strategy the team wanted by majority, the skarner game it was "just ap junglers" with rammus a trollpick, the poppy game was "ap" with eve a bit trollpick due to them admitting not knowing for sure, and the elise game they wanted "just tanks". it still works better than not asking what they want to go for at all and getting pell mell messes and dodges]
heck there was one we agreed to try to give em all physical damage only adcs and just rush thornmail first whatever we got, and we got mostly ap mages and won(though someone gave em ashe who went full ap .. oi.). enemy team seemed to enjoy that one in spite the loss as it was closer than if we'd been all tanks.
it is, in short, all over the place.
the only truly deciding factors overall have been team honesty and effective communication coupled with flexibility versus rigidity. and those begin as the bans are starting not the loadscreen, but cannot stop when the game starts either. lol gods bless the players who get giddy over adc nami top and the like when it happens to be the seemingly best way to handle assignation in a match, or fulltank initiator janna, or ad hydra bork splitpush braum. that can do might fail but going to try, and ensuring that where possible noone is first timing or totally blindsided goes leagues in chances of success, not to mention having a pleasant game.
which takes me back to the op: you were working your desires over a good faith choice for the team in a draft situation by your own admission and presentation of the details. bottom line one players individual imagined fantasy they want to see doesn't trump the team, and putting that fantasies actual occurrence first was assisting the enemy. the same would have been true if the target lineup was all melee and you gave em nami or janna, or all imobile apc and you give them leona. maybe you are right and they only cried over yasuo because op perception, but perhaps its more a matter of crying over yasuo because you just counterpicked your own team for the enemy op.
you even fail to present it as fitting a team composition goal or a choice as a counterpick to what you had that should be shut down by one of your teams options. you state quite clearly you just wanted to see it.
but i cannot harp on you really: we don't know if galio v yas was because people just presumed a lane and never called for a swap or anything else to deal with the issues or not. we don't know how the rest of the team communication went, if any(aside from complaint). we don't even know if the interpreted complaint was actually an ineffective way to communicate a need for a swap or help. we don't know the rest of the picks for either side, we don't know the order of picks.
we don't know quite a lot, especially given nemesis doesn't show up in match history outside the clients last few matches played list.
so aside from what you have presented which reads a very specific way, the compounding of the pick could have been almost any number of other issues, most likely drawing from that list of common failures i started with.
but don't let that stuff get you down: if you run it enough either you'll start shaking uncontrollably and have a nervous breakdown, or some suprising games in weird directions. that poppy and elise game had me do the former, but i've also had a few of the latter. still waiting through multiple attempts to get through draft without a dodger to see how it goes after it all.