Select All Tracks

Could you confirm the tracks you want unselected are always next to each other and all visible on the same screen ?
Two track together wouldn't be a problem, but if you think there is a chance they could be 20, I could have to change my idea.

Presuming the last question is true, here's something.
Easiest and safest than this would be to create a group excluding these tracks and the script would just click that group symbol.

/**
* @param {string} name
*/
function selectAllTracksFromGroupSymbol(name = "<ALL>") {

    sf.ui.proTools.groupsEnsureGroupListIsVisible();

    // Get all groups info
    const groupListState = sf.ui.proTools.mainWindow.groupListView.invalidate().childrenByRole('AXRow').map(r => ({
        groupName: r.childrenByRole('AXCell').allItems[1].buttons.first.title.value.split(/-\s/)[1],
        groupSymbol: r.childrenByRole('AXCell').allItems[0].buttons.first,
        groupState: r.childrenByRole('AXCell').allItems[0].buttons.first.value.invalidate().value.replace("Selected. , ", ""),
        groupIsSelected: r.childrenByRole('AXCell').allItems[0].buttons.first.value.invalidate().value.startsWith("Selected.")
    }));

    groupListState.filter(grp => grp.groupName === name)[0].groupSymbol.elementClick();
};



/**
* @param {Array.<string>} unselectOptions
*/
function selectAllTracksANDunselectTracksWith(unselectOptions) {

    const unselectTracks = sf.ui.proTools.visibleTrackHeaders.filter(track =>
        unselectOptions.some(el => track.normalizedTrackName.includes(el))
    );


    unselectTracks[0].trackSelect();
    unselectTracks[0].trackScrollToView();
    unselectTracks[0].popupButtons.first.mouseClickElement({ isShift: true, isControl: true });

    //No parameter will use by default group <ALL>
    selectAllTracksFromGroupSymbol();


    unselectTracks.forEach(tr => tr.popupButtons.first.mouseClickElement({ isCommand: true }));
};

// Exclude from selection tracks that include these strings
selectAllTracksANDunselectTracksWith(["ROUGH MIX", "TH MIX"]);