Hypertrophy is probably more likely related to basal testosterone levels and autocrine/pericrine (local hormone production in the cell and adjacent cells) rather than exercise induced systemic spikes in testosterone (by using a large amount of muscle mass - e.g. squatting) - look up research on occlusion for more info. Also it is unclear if shorter rest or really high rep schemes are absolutely necessary for hypertrophy - the jury is out on this one.
The key factors are probably working muscles groups in various ways with multiple exercises, making sure you damage the muscles sufficiently and also nutrition in and around training specifically amino acid and carbohydrate supply.
If you want to get big then:
1.Do different exercises for the same muscle group
2. Use aminos/protein in and around training
3. Make sure your body recovers thoroughly
4. Train consistently year on year while doing everything possible to avoid overuse and injury. As the old saying goes “Muscle takes time”.