Observations and some things to try:
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The drive itself seems to be very slow in general. Small requests are frequently taking 0.5 - 1 second to process, which is a long time even for a network drive. GoogleDriveFS.exe is also doing a lot in parallel when Opus is accessing the drive, and its requests are taking a long time as well.
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GetSizes commands still seem to be running, either automatically or manually. Preventing those will reduce the overheads a bit (or possibly a lot, depending on what's going wrong here). See Calculate Folder Sizes Automatically if you've done something that causes the calculations but aren't sure what.
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Turning off Preferences / Folders / Folder Display / Display localized folder names should help a bit.
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Turning on Preferences / Folders / Folder Display / Show generic icons for... for the drive type should help a bit. (I'm not sure if it will be considered a network drive or a local one. Hopefully network, but the way Google Team Drive works is unusual and it might claim to be a local drive. We've seen other examples where e.g. Google Team Drive says it is a FAT32 drive even though it supports files > 4GB, so it may misrepresent itself.)
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Both Opus and GoogleDriveFS.exe are showing potential signs of antivirus impacting them quite a lot when they write files to the local drive, with CloseFile calls taking a very long time. That could slow things down in itself, but may also be impacting the network drive as well or more (although it's hard to tell for sure if this is happening). (This slowness could also be due to the local drive being under heavy load, but it doesn't look it from the logs.)