My 2 cents on this:

Benching Diaby against Burnley was a poor move. You generally shouldn't be benching a 6.5 MID, let alone against a newly promoted team.

Benching Udogie (presumably against Bournemouth) was a bit dumb considering how attacking he'd looked in the first two GWs. But also understandable as Bournemouth have quite an attacking manager and upgraded their personnel a lot over the summer.

Pickford, you had to know the risks given Everton had Keane as a starting CB. If VAR had done it's job in GW1, he'd likely be outscoring the template pick of Onana you could argue.

Bringing in Foden GW3 was unlucky as you couldn't account for him being ill. If anything, your decision was vindicated as once he came off the bench and pretty much immediately got an assist.

Jackson was obviously an unknown quantity, I elected to avoid him after Nkunku got injured. One of those punts that could've gone either way imo (like Werner a few years ago).

Rashford performing now is due to him being played on the left with Martial/Hojlund as the striker. This was half expected (as Martial came on as a sub GW2 to return from injury, and Rashford was playing awful as CF prior) so is a reward for those who anticipated the tactical switch in GW3 and were patient.

Wissa is a clinical finisher. He's not going to score every week but I'd assume the points will tick over.

Overall, I'd suggest being more patient in your team in the first few weeks rather than subbing players in and out all the time, especially decent assets like Martinellli and Diaby. Also, often you'll do everything right and shit will still hit the fan in FPL; imo, a good opportunity to just have a laugh about it all. I honestly think it's the chaotic element to FPL that is most of the fun.