trying to rewrite the bat files in light of delayed expansion... not going well. what is happening? I hate windows cmd shell

activate.bat

@@ -1,23 +1,14 @@
-FOR /r "C:\Program Files\Microsoft Visual Studio" %%G IN (*vcvars64.bat) DO (
-    SET "_file=%%G"
-    SET "_comp=%_file:\VC\=%"
-    IF NOT "%_comp%" == "%_file%" Call "%_file%"
-)
+SETLOCAL ENABLEDELAYEDEXPANSION
 
 FOR /r "C:\Program Files\Microsoft Visual Studio" %%G IN (*vcvars64.bat) DO (
     SET "_file=%%G"
-    SET "_comp=%_file:\VC\=%"
-    IF NOT "%_comp%" == "%_file%" Call "%_file%"
+    SET "_comp=!_file:\VC\=!"
+    IF NOT "!_comp!" == "!_file!" "!_file!"
 )
 
 FOR /r "C:\Program Files (x86)\Microsoft Visual Studio" %%G IN (*vcvars64.bat) DO (
     SET "_file=%%G"
-    SET "_comp=%_file:\VC\=%"
-    IF NOT "%_comp%" == "%_file%" Call "%_file%"
+    SET "_comp=!_file:\VC\=!"
+    IF NOT "!_comp!" == "!_file!" "!_file!"
 )
 
-FOR /r "C:\Program Files (x86)\Microsoft Visual Studio" %%G IN (*vcvars64.bat) DO (
-    SET "_file=%%G"
-    SET "_comp=%_file:\VC\=%"
-    IF NOT "%_comp%" == "%_file%" Call "%_file%"
-)

build.bat

@@ -3,7 +3,7 @@ SET flags=-Od -ZI
 IF "%1" == "release" (
     SET flags=-O2
 )
-@echo on
+@ECHO on
 SET srcs=src\*
 mkdir bin obj
 cl %srcs% Ws2_32.lib -I inc %flags% -std:c++20 -MP -Fo:obj\\ -Fe:bin\\

export.bat

@@ -1,3 +1,4 @@
+@ECHO off
 SETLOCAL ENABLEDELAYEDEXPANSION
 
 Echo [ > compile_commands.json