And tried to starve them of weapons in the beginning which is why it took so long for them to get equipped, and why the photos in the beginning of the war show them using WWI weapons, and what they could capture from the enemy.
And why so many once the war started most were raised from conquered territories.
When conscription started in 1935, the Army got the bulk of those eligible to be drafted. And as you said earlier, at that point what would become the Waffen SS was only a few regiments. Where as the Germany Army had 25 Divisions (for those that do not know, a division is made up of 2 or more Regiments). And during the war, the German Army grew to over 400 numbered divisions. In comparison, the Waffen SS only had 38 numbered divisions.
And to show how insane the competition for "Field Divisions" in WWII Germany was, the Luftwaffe also had 22 Infantry Divisions. Now the first 7 made a kind of sense, as they were Fallschirmjager Divisions (paratroops), but they were rarely used as such. The 8th, 9th, and 10th Divisions were Fallschirmjager in name only, and after that Goring just gave up and they were all trained and equipped as regular infantry. Probably the only military in the world that had 22 Infantry Divisions commanded by the Air Force.
And unlike the Army, the Waffen SS units were heavy in Panzer Divisions. That is actually where most "Germans" that were in those organizations served. Most of the "Waffen SS Infantry" divisions were composed of foreigners. As they were in occupied territories they were not eligible for conscription, so made a huge pool that the SS could recruit from that were not subject to turf wars with the military for conscripts. When one looks at the infantry divisions of the Waffen SS, you even see where they were recruited from.
The 11th Panzergrenadier Division Nordland were primarily recruited from Denmark.
The 14th Waffen Grenadier Division Galizien were recruited from Ukraine.
The 15th Waffen Grenadier Division Latvian was obviously recruited from Latvia.
One of the most famous was the 33rd Waffen Grenadier Division Charlemagne, who were recruited in France.
In a strange quirk of history, all of those who served in the SS Charlemagne Division were stripped of their French citizenship after the war. However, many realized that there was a loophole. In that while the French Foreign Legion did not accept those of French citizenship, as stateless citizens they could then join and serve in the Foreign Legion. And after three years of service they would become French citizens again. Once the French realized this they quickly closed the loophole, but not before thousands joined. And many later met their end at Dien Bien Phu.
But yes, the German Army and the Waffen SS never did like each other (the Army actually had much better relations with the Luftwaffe Field Army than the Waffen SS). And that was for many reasons, including the fact that many of the leaders were not real military men, but picked for party loyalty. Their first leader was a WWI Sergeant, who essentially got the position because he was Hitler's bodyguard and driver. Another was Eva Braun's brother-in-law, who had been kicked out of the police academy for cheating and once again only got the position for his relationship to Hitler.
And Himmler also had no military background. In training as a cadet, the war ended in 1918 while he was still in training and he was dismissed along with all the others in his class. He was of all things an agriculture student and was slated for a career in agriculture, but his anti-Semitic zeal and fanaticism for the party led him to the top of the SS and the second or third in line for control of all of Germany.
The German military itself saw itself as an aristocratic organization, a true professional military and the descendent of the Prussian military. They saw the Waffen SS as little more than street thugs. Good in a fight if you wanted to throw numbers away to break through. But otherwise of no use at all in an actual war.