Some people add fibre and immediately blame fibre for bloating. The real story is usually more specific.
Certain fibres are fermented by gut bacteria. That fermentation can produce gas, especially when the dose rises suddenly. Foods like beans, chana, rajma, onions, some fruits and prebiotic fibres can feel heavy for sensitive people. This does not make them bad foods. It means the gut may need a slower introduction.
The type of fibre matters too. PHGG and acacia fibre are often used in gentle gut health products because they are soluble and usually easier to include in drinks. Inulin and FOS can be useful prebiotics, but some people feel gas with them at higher doses. Psyllium husk is less about fermentation and more about water holding and gel formation, so its tolerance issues are different.
A practical plan is to increase one thing at a time. Do not add sprouts, beans, raw salad and a new fibre supplement on the same day. Start with a small serving. Drink water. Cook vegetables if raw salads feel harsh.
Bloating is information, not failure. Adjust the fibre type, dose and speed before giving up on gut health.
Bloating is the gut giving you feedback, not a verdict on fibre itself. Slow the dose down before ruling an ingredient out.