New to this - help with Inland High Speed PETG+?

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Been messing around trying to get a good profile for this filament - this is the best I've gotten so far, not sure what's causing the issues. (Not too worried about stringing at this point)

My current primary suspect is possibly over-extrusion and/or something with temps/(lack of) cooling causing the corners (front and rear of the boat) to build up more than the rest and then get messed up by subsequent passes (I see the nozzle pushing them down/out of the way when printing), but I'm very new to this, so I have no idea how close this might actually be.

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I've found the big guide thingy and am going through that, any feedback in here still appreciated though ^^

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update: wet and the table has too much movement I think. gonna work through that issue first w/ PLA I think

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stability issues are under control, but I think the X belt assembly is just messed up somewhere. don't want to take the thing apart and rebuild it, and while there are still ripples on overhangs, it's now good enough for my use cases (everything I print w/ PETG will be sanded and painted anyway)