Sorry to bump this again, but I didn't get time to respond yesterday. There's no way to prove anything one way or the other obviously, but I'd make the point that the tight matches are almost by definition ones where the teams are sufficiently evenly-matched that you can easily find reasons to vote for either team. In that situation it often comes down to the 'debating contest' aspect of the matches. There's nothing wrong with that either, but it's unavoidable that you find some managers' debating styles particularly persuasive, and others less persuasive or an active turn-off. For example, I'm pretty sure I would have routinely voted for Joga in tight matches when he was participating in drafts, as his knowledge of the players shone through clear as day in his posts, and also I liked his style, where he generally gave a realistic, almost neutral account of how the match could pan out, and acknowledged the strengths of the other team. Others probably gravitate more to the managers who drum home their advantages more emphatically.
I don't think it screams 'vendetta' for Gio to vote against you in those tight matches, not when his overall voting pattern is only 4-6 against you in the past 10 matches. Given that you routinely do very well in these drafts you clearly have voters that agree with you more often than not, and I find it unfortunate that there's a spotlight on Gio and his votes now when 1) he's close to 50/50 in voting pattern in your matches and 2) his voting against you is easily explicable by factors such as rating players differently or not finding your debating style particularly persuasive rather than outright bias against you.
On a broader note, and as Theon alluded to yesterday, due to Tuppet-gate, the relatively low number of proper neutrals voting on matches, and the very high likelihood of low-level grudges forming between regular managers down the years, there's just no point in getting too invested in the outcomes of matches. It's not as if winning a draft match really means that you know more about football than the guy who lost.
@Šjor Bepo is hands down one of the most knowledgeable posters in our community, and I've heard that they declare a national holiday in Croatia now if he ever makes it out of the first round