Since there isn't much to go off on here are some helpful hints and tactics:
If you can, add the scripts at the bottom of the pages before the closing <body>
tag... so that your site will seem to "render" faster also allowing the scripts to load after the CSS has already loaded. This can speed up or make it seem like your site is loading faster.
<!-- <scripts> -->
</body>
</html>
Regarding the CSS, load them in the header
after the meta
tags but before the closing </header>
tag. You can combine them into one with @import
but I would not recommend this approach as this can greatly affect load time if the CSS is lengthy. If that is what you did when you say you tried combining your CSS files and then call it "into the header" then you need to undo that and remove the @imports
EDIT
So on top of these suggestions-- which you should at least consider moving the scripts to the end of the pages/templates. You also have several console errors that need to be addressed...